|| List of recent Feedback Signal-related patents
|Optical polarization demultiplexing for a coherent-detection scheme|
An optical receiver having a plurality of optical iq modulators arranged in a butterfly configuration and configured to operate as an optical polarization de-multiplexer. The optical receiver further has (i) an opto-electric circuit configured to apply optical homodyne detection to an optical input signal received by the optical receiver and (ii) a controller configured to generate one or more control signals for driving the iq modulators of the plurality based on one or more electrical feedback signals received from the opto-electric circuit..
|Feedback signalling for multicast data transmission|
Data transmission in a multicast fashion in which retransmissions are requested by recipients sending feedback to the one sender. Receiving stations are informed about the feedback of another receiving station.
|Switching regulator including charge pump|
The present invention discloses a switching regulator. The switching regulator converts an input voltage to an output voltage.
|Method and apparatus for controlling power converter with inverter output filter|
Power converters and methods are presented for driving an ac load connected through an intervening filter circuit, in which at least one filter current or voltage signal or value is determined according to feedback signals or values representing an output parameter at an ac output of the power converter, and ac electrical output power is generated at the ac output based at least partially on the at least one filter current or voltage signal or value.. .
|System and method of tractor control based on agricultural implement performance|
A method and system for controlling operation of a tractor and/or agricultural implement towed by the tractor is disclosed. A vibration sensor is mounted to the agricultural implement to detect the magnitude of vibration, or bounce, on the agricultural implement.
|Control circuit for programmable power supply|
A control circuit for a programmable power supply is provided. It comprises a reference generation circuit generating a voltage-reference signal and a current-reference signal for regulating an output voltage and an output current of the power supply.
|Method and system for feedback on running style field and background of the invention|
The invention relates to a system and method for providing feedback to a user on his or her running style or running technique. The system employs a pressure sensitive surface to record a gait line of the center of pressure exerted by the user's foot on an underlying surface during a footstep period.
|Mobile telecommunication repeater for canceling feedback signals|
A mobile telecommunication wireless repeater includes: a combination stage for combining a received signal with a feedback cancellation signal; a comparison stage for comparing an input signal of the combination stage with an output signal of the combination stage and determining a weighted value and a time offset value for a feedback signal to be cancelled, based on the comparison; and a recombination stage comprising one or more adaptive filters and configured to receive the weighted value and the time offset value and generate the feedback cancellation signal according to the weighted value and the time offset value.. .
|Radio communication system, radio base station apparatus, user terminal and radio communication method|
The present invention is designed to reduce the space to install antennas and still increase the system capacity despite the state of the distribution of user terminals in cells. According to the radio communication method of the present invention, a radio base station apparatus selects precoding vectors from a codebook that is set in advance to be uneven with respect to the direction of the arrangement of antenna elements, based on communication quality information of the user terminals in the cell, multiplies signals to supply to each antenna element by the selected precoding vectors, and transmits the signals multiplied by the precoding vectors to the user terminals, and the user terminal receives a signal from the radio base station apparatus, extracts a reference signal from the received signal and measures channel quality; and feeds back a communication quality feedback signal, including the measured channel quality, to the radio base station apparatus, via the uplink..
|Methods and arrangements in a wireless communication system|
Method and arrangement in a user equipment for adjusting signals transmitted in uplink to a network node based on a feedback value received from the network node. The method includes transmitting a signal, to be received by the network node.
|Primary-side controlled programmable power converter|
A circuit for controlling a programmable power converter is provided. The circuit comprises a control circuit, a switching controller, and a first opto-coupler.
|Circuit with synchronous rectifier for controlling programmable power converter|
A control circuit of a power converter and a method for controlling the power converter are provided. The control circuit of the power converter comprises a switching circuit and a temperature-sensing device.
|Dual-mode switching power control device|
A dual-mode switching power control device includes an electric transformer, a pwm driving controller, a switching transistor, an isolation element, an output diode and an output capacitor. The pwm driving controller is connected to the switching transistor coupled to the electric transformer.
|Transmission signal power control apparatus, communication apparatus and predistortion coefficient updating method|
A transmission signal power control apparatus includes a power amplifier model unit which generates a learning digital signal by multiplying part of a predistortion signal by model coefficients which tentatively represent the input-output characteristics of a power amplifier, and an adaptive low-pass filter which generates a pseudo feedback signal by attenuating the high frequency components of the learning digital signal by multiplying the learning digital signal by weighting coefficients. Then, the power amplifier model unit updates the model coefficients such that the error between the feedback signal whose the high frequency components are attenuated by the low-pass filter and which is digitized, and the pseudo feedback signal is minimized, and the adaptive low-pass filter updates the weighting coefficients such that the error is minimized..
|Phase locked loop circuit|
A phase locked loop circuit is provided which includes a bang-bang phase frequency detector configured to receive a reference signal and a feedback signal, detect a phase difference between the reference signal and the feedback signal, output a detection signal on the based on a result of the detection; an analog-digital mixed filter configured to receive the detection signal and output a control signal on the basis of the received detection signal; a voltage controlled oscillator configured to output an output signal in response to the control signal; and a divider configured to divide the output signal by n to output as the feedback signal. The detection signal is a digital signal, and the control signal is an analog signal..
A power-supply apparatus according to an aspect includes an inductor, a transistor that supplies, in an on-state, a current to the input side of the inductor, a second transistor that becomes, when the first transistor is in an off-state, an on-state and thereby brings the input side of the inductor to a predetermined potential, a signal generation unit that generates voltage signals corresponding to a current flowing to the inductor, an amplifier that outputs a current according to the voltage signals, a converter that converts the current output from the amplifier into a voltage signal, and a control unit that controls the transistors based on a first feedback signal corresponding to the voltage on the output side of the inductor and the voltage signal, which is used as a second feedback signal.. .
|Motor controlling device, motor controlling method and machinery system|
A motor controlling device is provided. The device includes a position controller for generating a speed reference based on a positional reference and a motor position, a speed controller for generating a torque reference based on the speed reference and a motor speed, a motor drive for driving a motor based on the torque reference, the motor driving machinery to which an acceleration sensor is attached, an acceleration feedback signal generator for generating a feedback signal to the speed reference based on an acceleration detection signal that is a detection signal of the acceleration sensor, and a positional reference filter inputted with the positional reference and suppressible of low frequency vibration of the machinery..
|Feedback signaling error detection and checking in mimo wireless communication systems|
A method of feedback in a wireless transmit receive unit includes providing a precoding matrix index (pmi), error checking the (pmi) to produce an error check (ec) bit, coding the pmi and the ec bit and transmitting the coded pmi and ec bit.. .
|Drift tracking feedback for communication channels|
A communication channel includes a first component having a transmitter coupled to a normal signal source, and a second component having a receiver coupled to a normal signal destination. A communication link couples the first and second components.
|Switching power supply apparatus and method of controlling switching power supply apparatus|
A switching power supply apparatus includes a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching element coupled in series to the primary winding; an output circuit section generating a voltage output from power transferred from the primary winding to the secondary winding in response to a switching operation of the switching element, a feedback signal generation circuit section configured to, during a secondary side conduction period in which an electric current flows through the secondary winding, generate a feedback signal having a signal level corrected based on a length of the secondary side conduction period, from an auxiliary winding voltage induced in the auxiliary winding, and a control circuit section driving the switching element based on the feedback signal.. .
|Amplifier circuits and methods of amplifying an input signal|
A method of operating an amplifier circuit having a pre-charge phase and a sample/conversion phase includes, during a pre-charge phase, charging first and second capacitors to first and second bias voltages. The first capacitor is coupled to a first input of an amplifier circuit, which has a second input and an output.
|High efficiency linearization power amplifier for wireless communication|
A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an rf modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the rf modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier..
|Systems and methods for controlling frequency synthesis|
Disclosed are systems and method for controlling frequency synthesizers. A control system can be implemented in a phase-locked loop (pll), such as a frac-n pll of a frequency synthesizer, to reduce or eliminate reference spurs.
|Semiconductor laser device|
A laser device (100) includes a laser (110; 210; 310; 410; 510) in turn including at least one distributed bragg reflector (dbr) section (111), at least one phase section (112) and at least one gain section (113), further including a laser control element (150), a feedback control element (140) and a frequency noise discriminator (130,131), which feedback control element is arranged to feed a variable feedback signal to at least one of the at least one dbr section and the at least one phase section of the laser, so that the output laser frequency is altered in response to a variation in the feedback signal or the combination of respective feedback signals, whereby the feedback signal or combination of respective feedback signals is varied as a function of the detected frequency fluctuation so as to counteract the detected frequency fluctuation.. .
|User-equipment-managed direct device to device communications|
Systems, methods, and apparatuses of a wireless communications network involve receiving configuration information for the first ue (ue1 configuration information) for an inter-device session (ids) between the first ue and a second ue, the ue1 configuration information including a radio network identifier. A control message configured with the radio network identifier and a radio resource identifier may be received.
|User-equipment-managed direct device to device communications|
Methods, systems, and apparatuses a wireless communications network involve transmitting configuration information for a first user equipment (ue1 configuration information) for an inter-device session (ids) between the first user equipment (ue) and a second ue, the ue1 configuration information including a radio network identifier. A control message configured with the radio network identifier and a radio resource identifier can be transmitted.
|Base station, terminal, system and method for data transmitting in time-division duplex system|
A base station, a terminal, a system and methods for performing data transmission in a time division duplex (tdd) system are disclosed. One of the methods includes: the base station sending an uplink scheduling grant signaling to the terminal on a carrier m, and after receiving uplink data sent by the terminal through a physical uplink shared channel (pusch) on a carrier n, the base station sending an ack/nack feedback signaling corresponding to the pusch to the terminal on the carrier m; wherein, m≠n; a timing relationship between a subframe by which the base station sends the uplink scheduling grant signaling and/or the ack/nack feedback signaling and a subframe where the pusch is located is identical with a hybrid automatic repeat request (harq) timing relationship corresponding to an uplink/downlink configuration of the carrier m or the carrier n..
|Zero keeper circuit with full design-for-test coverage|
A zero keeper circuit includes a dynamic input pfet connected to a source, an output, and a dynamic input. The circuit also includes a clock input nfet connected to the output, a pull-down node, and a clock input.
|Electronic circuit control element with tap element|
An example control element for use in a power supply includes a first terminal, a power mosfet, and a control circuit. The power mosfet has a drain terminal, a source terminal, a control terminal, and a tap terminal.
|Backlight driving apparatus and liquid crystal display device using the same|
Disclosed is a backlight driving apparatus. The backlight driving apparatus includes a light source configured to include at least one led, a dc-dc converter configured to generate a driving voltage according to a turn-on of a switching element and supply the driving voltage to the light source, a feedback circuit configured to generate a feedback voltage corresponding to a voltage level of the driving voltage supplied from light source, a duty controller connected to the light source, and configured to control a turn-on period of the led according to an led duty signal corresponding to a backlight dimming signal, and a switching controller configured to generate a pwm signal for controlling the turn-on of the switching element according to the feedback signal, generate a switching control signal corresponding to the pwm signal according to the led duty signal, and selectively control the turn-on of the switching element..
|Touch panel device and method of controlling a touch panel device|
An apparatus including: a panel; actuators; a movement input determining unit which calculates movement directions and distances of touch positions, based on time-series information of the touch positions; a display unit; a direction determining unit which determines a direction of an object included in the content item with respect to the display unit; a vibration position determining unit which determines a first touch position closer/closest to the object and one or more second touch positions detected simultaneously; a vibration determining unit which determines a tactile feedback signal presenting a vibration for the first touch position, based on the object direction; a multi-point simultaneous vibration control unit which performs control for presenting the vibration at the first touch position and not presenting the vibration at the second touch positions; and a content control unit which enables display of the content item by scrolling it based on the movement directions and distances.. .
|Fast response control circuit and control method thereof|
In one embodiment, a control circuit configured to control a switch mode power supply, can include: (i) a compensation signal generating circuit configured to generate a compensation signal according to an error between an output voltage feedback signal and a first reference voltage of the switch mode power supply; (ii) a switching signal generating circuit configured to control a switching operation of a power switching device of the switch mode power supply according to the compensation signal; (iii) a judge circuit configured to determine an operation state of the switch mode power supply according to the output voltage feedback signal; and (iv) a loop gain regulating circuit configured to regulate a loop gain of the control circuit according to the operation state.. .
|Mixed mode compensation circuit|
A mixed mode compensation circuit for a power converter generate a digital signal according to a reference signal and a feedback signal which is related to the output voltage of the power converter, convert the digital signal into a first analog signal, offset the first analog signal with a variable offset value to generate a second analog signal, and filter out high-frequency components of the second analog signal to generate a third analog signal for stable output voltage of the power converter. The mixed mode compensation does not require large capacitors, and thus the circuit can be integrated into an integrated circuit..
|Method and apparatus for controlling programmable power converter|
The present invention provides a circuit for controlling a programmable power converter. The circuit includes a micro-controller, a controller, and a timer.
The disclosure relates to systems and methods for electronic intubation of bodily passages such as the nasolacrimal duct. The disclosed technology can be embodied in an apparatus that includes an electrically conductive probe configured to be extendible through a body passage, and a conductive tool for locating the probe in the body passage.
|Using multiple and a single feedback for ue uplink beamforming in soft handoff|
Embodiments of the present invention describe methods for increasing the amount of information available to a mobile transmit diversity transmitter during soft handoff. According to embodiments of the invention, a transmit diversity transmitter may determine substantially when it is in uplink communication with one base station and downlink communication with another base station.
|Modulator for optical transmitter|
An optical transmitter has a modulator for modulating data onto an optical signal for transmission to the receiver, the modulated signal having components at one or more constellations of points of different amplitudes and phases. The modulator is tunable such that distortions of the points of the one or more constellation can be tuned, and a tuning controller is provided for receiving a feedback signal from the receiver indicating a distortion measured at the receiver, and for tuning automatically the modulator to adjust the modulation based on the received feedback signal to pre-compensate for the measured distortion.
|System and method for providing device with integrated time code generator, transmitter, and reader with interruptible feedback monitoring and talkback|
A time code signal is transmitted. An audio input is provided.
|Lcd panel driving method, driver circuit and lcd device|
A driving method for liquid crystal display (lcd) panel includes the following steps: a. Sending feedback signals to a monitoring module before timing control modules (t-cons) sends driving signals to drive display of the lcd panel; b.
|Distortion compensation device and distortion compensation method|
A distortion compensation device includes: a distortion compensator configured to output, to a power amplifier, a predistortion signal obtained by performing distortion compensation processing on a transmission signal by using a distortion compensation coefficient, wherein the distortion compensator limits bands of a reference signal and a feedback signal so that the bands fall in a pass band and updates the distortion compensation coefficient based on an error between the reference signal and the feedback signal, the reference signal corresponding to the predistortion signal, the feedback signal corresponding to an output feedback of the power amplifier.. .
|Efficient data-storage devices that include memory elements characterized by potentially large switching latencies|
One example disclosed in the application is an electronic data-storage device comprising one or more arrays of memory elements that each includes a data-storage medium that is switched between two different states by application of a switching-inducing force or gradient to the data-storage medium, a top control element and a bottom control element through which the switching-inducing force or gradient is applied, and a feedback signal. The data-storage device also includes an error-control-coding encoder that encodes received data and a read/write controller that writes encoded data received from the error-control-coding encoder to a number of memory elements by applying the switching-inducing force to the one or mare arrays of memory elements until feedback signals indicate that the write operation has completed or until the switching-inducing force or gradient has been applied for a maximum application time..
|Minimally invasive implantable neurostimulation system|
An external medical device generates a drive signal inductively coupled to an implantable coil from an external coil. A regulator module coupled to the implantable coil generates an output signal in response to the inductively coupled signal and a feedback signal correlated to an amplitude of the inductively coupled signal.
|Switched resonant ultrasonic power amplifier system|
A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device.
|Switch mode power supply, control circuit and associated control method|
A switch mode power supply having an output terminal configured to provide an output voltage, the switch mode power supply has a first switch, a second switch and a control circuit. The control circuit is configured to provide a first switching control signal to turn on and turn off the first switch, and when the switch mode power supply works in a power saving mode, the first switch is turned on if a voltage feedback signal is less than a reference voltage and a current flowing through the second switch is less than a bias current..
|Constant time control method, control circuit and switch regulator using the same|
In one embodiment, a method of controlling a switching regulator can include: obtaining a voltage feedback signal by detecting an output voltage; generating a triangle wave signal by detecting a current flowing through an inductor; generating a first control signal by superimposing the triangle wave signal and the voltage feedback signal; calculating an error between the voltage feedback signal and a first reference voltage, and compensating for the error to obtain a compensation signal; generating a second control signal by comparing the first control signal against the compensation signal; and controlling switching of a power switch in the switching regulator based on the second control signal and a constant time control signal, where an output signal of the switching regulator is maintained as substantially constant.. .
|Two-inductor based ac-dc offline power converter with high efficiency|
Embodiments disclosed herein describe the use of two inductors in a non-isolated power converter. The power converter receives power from a non-regulated power source, and converts the received power to regulated output signals.
|Control voltage signal synthesis system and method|
Multiple positions within a mechanical system are measured with a plurality of sensors including at least one 4-wire and at least one 5-wire sensor. The 5-wire sensor has two output voltage signals sent to a signal conversion processor, and the 4-wire sensor also sends a signal.
This invention relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound.
|Automatic ac bus voltage regulation for power distribution grids|
A system for automatically regulating voltage on a distribution-level ac bus having an actual voltage and a nominal voltage includes an electronic power converter connected to the distribution-level ac bus. The system generates a feedback signal representative of the actual voltage of the distribution-level ac bus and produces an input control signal in response to the feedback signal.
|Dual-mode, ac/dc power converter with power factor correction|
A dual-mode circuit for the control of an ac/dc power converter is disclosed. An example dual-mode controller circuit generates a waveform that drives a switch on or off and controls the power converter.
|Generating a tuned frequency output from a signal generator|
A method of tuning the frequency of a generated signal to form an output signal including: forming the generated signal at a signal generator; comparing a feedback signal with a reference signal and generating a control signal in dependence on that comparison, wherein the feedback signal is generated using the output signal; and generating the output signal by performing a frequency-dividing operation in dependence on the generated signal and a dividing factor, wherein the dividing factor is determined in dependence on the control signal.. .
|Multi-output switching regulator and multi-output power supply method|
The present invention discloses a multi-output switching regulator and a multi-output power supply method. The multi-output switching regulator includes: a power stage circuit for operating at least a power switch included therein and only one inductor included therein in response to a pulse width modulation (pwm) signal, thereby converting an input voltage to a converted voltage; a multiple outputs circuit for receiving the converted voltage to generate a plurality of output currents; a voltage detecting circuit for generating a feedback signal according to the converted voltage; and a pwm signal generation circuit for generating the pwm signal in response to the feedback signal..
|Method and system for reducing write-buffer capacities within memristor-based data-storage devices|
One example disclosed in the application is an electronic data-storage device comprising one or more arrays of memory elements. The data-storage device also includes an error-control-coding encoder that encodes received data and a read/write controller that writes encoded data received from the error-control-coding encoder to a number of memory elements by applying the switching-inducing force or gradient to the one or more arrays of memory elements until more than a maximum-allowed number of write requests have been queued to the write-request buffer, until feedback signals indicate that the write operation has completed, or until the switching-inducing force or gradient has been applied for a maximum application time..
|Circuit for spread spectrum transmission and method thereof|
A spread spectrum transmission circuit includes a phase locked loop composed of a filter. The phase locked loop generates a series of incremental control signals and decreasing control signals based on the frequency difference and phase difference between a reference clock signal and a feedback signal.
|Delay quantity estimation apparatus and delay quantity estimation method|
A delay quantity estimation apparatus comprises a first correlation value arithmetic unit to calculate a first correlation value as a correlation value between a first input signal and a feedback signal delayed with a first delay value; a second correlation value arithmetic unit to calculate a second correlation value as a correlation value between the first input signal and a feedback signal delayed with a second delay value; and a delay quantity estimation unit to estimate a delay quantity of the feedback signal with respect to the input signal on the basis of the first difference value as a difference between the first correlation value and the second correlation value, wherein the second delay value is a value given by adding a certain value to the first delay value.. .
|Dual gate drive circuit for reducing emi of power converters and control method thereof|
A dual gate drive circuit for a power converter and a control method are provided for reducing emi of the power converter. The dual gate drive circuit comprises a switch and a switching control circuit.
|Apparatus and method for measuring position deviation of rotor of permanent magnet synchronous motor|
An apparatus for measuring a position deviation of a rotor of a permanent magnet synchronous motor includes a control unit, a power transformation unit, a rotor position estimator and a calculation unit. The control unit receives a d-axis dc voltage signal and a q-axis ac voltage signal and receives an initial value of the rotor position and a high-frequency signal to output a three-phase command signal.
|Surgical robot and surgical robot control method|
A surgical robot and a surgical robot control method ensure a stable change of an operation mode. The surgical robot includes a master device having an input unit, a slave device having at least one robotic surgical instrument that is remotely controlled by the master device, and a controller that performs a mode change process to gradually vary the strength of a feedback signal fed back from the slave device to the input unit for a predetermined time when a signal for a change of an operation mode is input via the input unit..
|Nested loop coherent beam combining system|
A nested loop system for combining coherent laser beams, the system includes multiple laser amplifiers each configured for emitting one of the laser beams, an output beam splitter configured for sampling each laser beam and for coupling each sampled laser beam to an inner feedback loop module, an output beam sampler configured for splitting the combined beam into a primary and a sampled output beam and for coupling the sampled output beam to the inner feedback loop module, multiple inner loop phase modulators each paired with one of the laser amplifiers, and the inner feedback loop module. For each laser amplifier the inner feedback loop module is configured to use the sampled output beam and the sampled laser beam associated with that laser amplifier to create a different inner loop feedback signal and to couple that inner loop feedback signal to that laser amplifier paired inner loop phase modulator..
|Reduction of periodic disturbances|
A method of reducing periodic disturbances in the feedback quantity of a controlled system is disclosed. The method includes receiving a feedback signal and repeatedly deriving respective magnitudes of harmonic components of the feedback signal to produce corresponding error signals.
|Absorbent articles with feedback signal upon urination|
Absorbent articles incorporating sensory element members are disclosed. The absorbent articles may be disposable pant like garments designed to assist urinary toilet training such as of young children.
|Digital pre-distortion of non-linear systems with reduced bandwidth feedback|
Embodiments of the invention provide a dpd system where the transmit reference signal is transformed, including sub-sampling, frequency translation, and the like, to match the feedback signal, which goes thru a similar transformation process, to obtain an error signal. The same transformation is applied to a system model, which may be jacobian, hessian, gradient, or the like, in an adaptation algorithm to minimize error..
|Method and apparatus for antenna array calibration using traffic signals|
An antenna array of a base station is calibrated using outbound traffic signals. The outbound traffic signals are captured for use as reference signals before the outbound traffic signals enter transmit paths in a radio unit of the base station.
|Antenna array calibration using traffic signals|
An antenna array of a base station is calibrated using outbound traffic signals. The antenna array includes a number of sub-arrays.
|Apparatus and method for detecting a change in output voltage of an isolated power converter|
A power converter controller includes a drive circuit coupled to control switching of a power switch to control a transfer of energy from an input of the power converter to an output of the power converter. A voltage sensor is coupled to the drive circuit to receive a feedback signal.
|Method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer|
Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer are presented. Aspects of the system may include at least one circuit that enables generation of an output signal in response to one or more generated input signals.
|Buck dc-dc converter with accuracy enhancement|
A buck switching regulator includes a feedback control circuit including a first gain circuit generating a first feedback signal indicative of the regulated output voltage; a ripple generation circuit generating a ripple signal that is injected to the first feedback signal; and a comparator receiving a first reference signal and the first feedback signal to generate a comparator output signal. The switching regulator further includes an offset compensation circuit including a second gain circuit generating a second feedback signal indicative of the regulated output voltage; and an operational transconductance amplifier (ota) configured to receive the second feedback signal and the first reference signal and to generate an output signal.
|Control for multi-phase induction motor|
A method of controlling operation of a multi-phase induction motor may include transmitting a low-speed operation signal by a master computer to a control signal board for low-speed operation of the motor; the control signal board receiving the low-speed operation signal, and in response to the low-speed operation signal, the control signal board sensing that the master computer is not simultaneously transmitting a high-speed operation signal, and in response to receiving the low-speed operation signal and not simultaneously receiving the high-speed operation signal, closing contactors in a power section to transmit power to the motor for low-speed operation, whereby the motor is connected to a source of multi-phase power and operates at low-speed; and the control signal board transmitting a first feedback signal to the master computer that the motor is connected to the source of multi-phase power and is running at low speed.. .
|Motor control apparatus, image forming apparatus having the same, and motor control method|
Disclosed herein are a motor control apparatus, an image forming apparatus, an image forming apparatus including the same, and a motor control method, by which position error of a motor and a control value for compensating for the position error are calculated and reflected in feedback control, thereby quickly removing position error of the motor. The motor control apparatus includes a detector to detect rotation of a motor to output a feedback signal, a measurer to measure speed and phase difference of the feedback signal and a target signal applied to the motor and to measure position counts by counting rising edges or falling edges of the target signal and feedback signal using a reference clock signal, and a calculator to calculate speed error of the motor from the measured speed of the target signal and feedback signal, to calculate position error of the motor from the measured position counts of the target signal and feedback signal, and to calculate control values for compensating for the speed error, the position error, and the phase difference..
|Feedback circuit for non-isolated power converter|
A feedback circuit for a power converter (e.g., a non-isolated converter) is disclosed. The feedback circuit may include a sense circuit coupled to receive an output current of the converter.
|Providing audio and ambient sound simultaneously in anr headphones|
In an active noise reducing headphone, a signal processor applies filters and control gains of feed-forward and feedback active noise cancellation signal paths. The signal processor is configured to apply first feed-forward filters to the feed-forward signal path and apply first feedback filters to the feedback signal path during a first operating mode providing effective cancellation of ambient sound, apply second feed-forward filters to the feed-forward signal path during a second operating mode providing active hear-through of ambient sounds with ambient naturalness, and provide an input electronic audio signal to an output transducer via an audio playback signal path during both the first and second operating modes..
|Reducing occlusion effect in anr headphones|
In an active noise reducing headphone, a signal processor is configured to apply first feedback filters to the feedback signal path, causing the feedback signal path to operate at a first gain level, as a function of frequency, during a first operating mode, and apply second feedback filters to the feedback signal path, causing the feedback signal path to operate at a second gain level less than the first gain level at some frequencies during a second operating mode. The first gain level is a level of gain that results in effective cancellation of sounds transmitted through or around the ear cup and through the user's head, and the second level is a level of gain that is matched to the level of sound of a typical wearer's voice transmitted through the wearer's head when wearing the headphone..
|Providing ambient naturalness in anr headphones|
In an active noise reducing headphone, a signal processor applies filters and control gains of both the feed-forward and feedback active noise cancellation signal paths. The signal processor is configured to apply first feed-forward filters to the feed-forward signal path and apply first feedback filters to the feedback signal path during a first operating mode providing effective cancellation of ambient sound, and to apply second feed-forward filters to the feed-forward signal path during a second operating mode providing active hear-through of ambient sounds with ambient naturalness..
|System and method for emitting and especially controlling an audio signal in an environment using an objective intelligibility measure|
Public address systems or other systems for emitting audio signals, like music, speech or announcements, in different locations like supermarkets, schools, universities, auditoriums are widely known. These systems usually comprise an audio source, for example a microphone or a recorder, and a plurality of loudspeakers, which are locally distributed in the locations, for emitting the audio signal from the audio source.
|Data transmission system and method|
A data transmission system is utilized in a mobile industry processor interface (mipi). A master device includes a control module for generating a control signal according to a feedback signal.
|Method and apparatus for feeding back and receiving acknowledgement information of semi-persistent scheduling data packets|
The application relates to radio communications and discloses a method and apparatus for feeding back and receiving acknowledgment (ack) information of semi-persistent scheduling (sps) data packets. The method includes receiving downlink data packets and an uplink data assignment indicator (ul dai) from a base station, wherein a value of the ul dai indicates a number (n) of all scheduled downlink sub-frames which scheduled by the base station for the user equipment, the number n is greater than 1, and a number k (k<n) of the downlink data packets is/are semi-persistent scheduling (sps) data packets; forming a feedback signal comprising n acknowledgements/negative acknowledgements (acks/naks) acknowledging the n downlink data packets, k acks/naks of the k sps data packets is/are placed from (n−k+1)th to nth positions of the n acks/naks; and sending the feedback signal to the base station starting from the ack/nak at the first position..
|Method for communicating between wireless devices and wireless device using same|
The present invention relates to a method for preventing a peer discovery signal collision, which can occur in a device-to-device (d2d) communication system, and to a wireless device using same. According to one embodiment of the present invention, a method for communicating between wireless devices by using a peer discovery slot is provided.
|Control circuit of power converter with temperature control and method for controlling power converter|
A control circuit of a power converter and a method for controlling the power converter are provided. The control circuit of the power converter comprises a switching circuit and a temperature-sensing device.
|Method and apparatus for digital control of a switching regulator|
An on/off controller device includes a control circuit to generate a control signal to switch a power switch between an on state and an off state to transfer energy from a primary side to a secondary side of a switched mode power supply. A comparator is coupled to generate an enable signal that enables and disables the switching of the power switch by the control circuit.