|| List of recent Duty Cycle-related patents
|Method and apparatus for detecting a target keyword|
A method of detecting a target keyword for activating a function in an electronic device is disclosed. The method includes receiving an input sound starting from one of the plurality of portions of the target keyword.
|Responsive load control method|
The responsive load control method manages the allocation and adjustment of service triggering grid frequencies across a population of responsive loads. The responsive load control method is particularly suited to responsive loads that have substantially no duty cycle or which have a long duration (>1 hr) duty cycle.
|Current source rectifier modulation in discontinuous modes of operation|
Systems and methods disclosed herein include a controller for a current source rectifier that is configured to facilitate operation in both continuous and discontinuous conduction modes. The controller comprises a discontinuous mode detection unit configured to determine when input current of the current source rectifier becomes discontinuous and a duty cycle calculation unit adapted to calculate duty cycles for the current source rectifier differently for operation in continuous or discontinuous mode.
|Method for balancing capacitors in an inverter|
The pwm modulating method comprises the following steps: detecting actual voltage values (vc1, vc1, vc2, vc3 . .
|Vehicular safety assistive device|
A vehicular assistive safety device that couples between a vehicular brake light and the vehicle's brake pedal switch, having a logic responsive to each activation of the brake pedal switch to initiate a duty cycle of a plurality of periods of various output intensity and duration of said brake light. Sequential period durations and intensities are unequal, respectively, to their predecessors.
|Event-driven clock duty cycle control|
Duty cycle error vectors that indicate both the magnitude and direction of the duty cycle error relative to a desired duty cycle are generated within a duty cycle measurement circuit, enabling threshold-based determination of whether duty cycle adjustment is necessary, refraining from power-consuming adjustment and follow-up measurement in those cases where the duty cycle is within a target range. When duty cycle adjustment is deemed necessary, the magnitude of the duty cycle error indicated by the duty cycle error vector may be applied to effect proportional rather than incremental duty cycle adjustment, quickly returning the clock duty cycle to a target range..
|Duty cycling to reduce average transmit power|
A user device receives a command to transmit information at a transmit power level specified by a wireless carrier. The user device determines whether transmitting the information at the specified transmit power level using a first duty cycle will cause the user device to violate a condition.
|Bridgeless boost power factor correction circuit for constant current input|
The present disclosure provides techniques for power factor correction on a constant current system without the use of a diode rectifier bridge. In an example embodiment, the present disclosure provides a power factor correction circuit which includes two switching mosfets biased in opposite directions which operate during opposite half cycles of the input current.
|Active power factor correction circuit for a constant current power converter|
The present disclosure provides techniques for power factor correction on a constant current system. In an example embodiment, the present disclosure provides a power factor correction circuit which receives a constant current power input.
|Voltage adjustment method, and voltage pre-regulator power supply circuit and system|
A voltage adjustment method, and a voltage pre-regulator power supply circuit and system, that implements highly-efficient output of a power supply in a quasi straight-through state and increases voltage output precision of a circuit. The voltage adjustment method includes receiving a to-be-adjusted voltage through a positive wire input end and a negative wire input end; changing, in a control mode in which a connection time is fixed and a disconnection time is adjusted, a duty cycle for the to-be-adjusted voltage to obtain a primary adjusted voltage; and changing, in a control mode in which a disconnection time is fixed and a connection time is adjusted, a duty cycle for the primary adjusted voltage to obtain an output voltage.
|Three-level led bulb microprocessor-based driver|
An led bulb is described, comprising leds within a shell and a driver circuit to operate the leds at a plurality of brightness levels. The driver circuit comprises first and second inputs to receive ac, a neutral input, a converter circuit, first and second rectifier circuits, a detector circuit, and a processing circuit.
|High duty cycle ion spectrometer|
An ion spectrometer is provided, comprising: an ion source, arranged to generate ions continuously with a first range of mass to charge ratios; and an ion trap, arranged to receive ions from the ion source along an axis, and to eject ions with a second range of mass to charge ratios orthogonally to that axis, the second range of mass to charge ratios being narrower than the first range of mass to charge ratios. In some embodiments, ions generated by the ion source continuously flow into the ion trap.
|System, apparatus, and method for thrust vectoring|
In various embodiments, the thrust vectoring systems described herein create variable reverse thrust during a landing event. The reverse thrust may be varied based on manual inputs, dynamically changing operating events, or a landing duty cycle.
|Transmitter with class e amplifier|
According to one embodiment, a transmitter includes a first buffer, a second buffer, a logic circuit, and a class e power amplifier. The first buffer receives a first sinusoidal signal, and converts the first sinusoidal signal to a first rectangular wave signal.
|System, method, and apparatus for heating|
The present invention relates to a heating element controller 100 for a liquid heating system arranged to determine the duty cycle of a heating element 106 and modulate the timepoint of heating initiation by the heating element 106 in dependence upon an expected duration of completing the heating process and upon a required time at which the heating process is to be completed, wherein said expected duration is determined in dependence on said duty cycle. The invention extends to a heating element controller comprising means for computing a fouling parameter and means for controlling the operation of the heating element in dependence upon the fouling parameter.
|Inverter circuit, power converter circuit, and electric vehicle|
An object is to reduce, with the control circuit of the full-bridge inverter circuit, distortions in an output signal of the inverter circuit resulting from an error in control of the switching of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit. The pulse width of a signal that controls on/off of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit is reduced, i.e., the duty cycle of the signal is reduced.
|Duty cycle based liquid level detection system for a driveline component|
The present disclosure relates to a detection system for detecting a liquid level in a rotating driveline component. The detection system may include a sensor for detecting the liquid and a receiver for determining the liquid level based at least in part on information detected by the sensor..
|Method for diagnosing a variable reluctance magnetic detection head, and detection circuit|
A variable-reluctance magnetic detection head delivers an electrical signal (uin) and a rising wavefront of the electrical signal is compared with a first threshold (th) in order to switch from a first state (b0) to a second state (b1), and a falling wavefront is compared with a second threshold (tb) lower than the first threshold (th) in order to switch from the second state (b1) to the first state (b0). In a diagnostics step, the first threshold (th) or the second threshold (tb) is modified, bringing these thresholds closer together, and a magnetic detection head is diagnosed as being defective if the duty cycle of the second state (b1) is modified during the diagnostics step by a value higher than a diagnostics threshold predetermined in relation to a reference level..
|Power converter for interfacing a fluorescent lighting ballast to a light emitting diode lamp|
An ac/dc power converter is coupled between a fluorescent ballast circuit and a set of light emitting diodes (leds) forming an led lamp. The power converter converts an ac output from the ballast circuit to a dc current applied to drive operation of the leds.
|Quick heating quartz toaster|
A commercial toaster apparatus having a “quick start” feature that nearly instantly changes from a “stand-by” mode to a “toasting” mode. The “quick start” mode is provided by changing the circuitry of some of the quartz heating elements from a series configuration to a parallel one wherein a higher voltage can be applied for a controlled amount of time to regulate the quartz heaters without adversely affecting the life span of the heating elements.
|Bias current control of laser diode instrument to reduce power consumption of the instrument|
Embodiments for driving a laser diode includes generating a bias current having a duty cycle that is less than 100%. The current level of the bias current is insufficient to turn on the laser diode.
|Clock signal error correction in a digital-to-analog converter|
In an example, there is disclosed herein a digital-to-analog converter (dac) including a correction circuit for a clock, including a differential clock. Error correction may take place within the dac core, by means of replica cells that are substantially similar to conversion cells.
|Method and apparatus for determining a target light intensity from a phase-control signal|
A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-dc converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a dc voltage representative of the duty cycle of the phase-control voltage.
|Apparatus and method for wetting current measurement and control|
A voltage signal and a wetting current are received from a switching device. A first pulse train is created from the voltage signal and the first pulse train has a first duty cycle that is proportional to the voltage at the switching device.
|Pulse switched resistor driver|
Pulse switching controller for the led lighting of the led drive module for lamps in automobile applications provided with light sources having led diodes and a drive module for the led function and excitation, where the drive module (3) comprises at minimum one resistance regulator (38) working in pulse switching duty, which is connected by its input to the last cathode of the corresponding branch (33) of led diodes and by its output to the input electrode of a switching element (37), which is connected by its output electrode to ground, while the controlling electrode of the switching element (37) is connected to the output of a pulse generator (36) with a set duty cycle in dependence on the input voltage, which is connected both by a sensor input to the input voltage from the input circuit (31) and by an external input (35).. .
|Power stealing for a wireless-enabled thermostat|
Disclosed are exemplary embodiments of apparatus, systems and methods for power stealing for a wireless-enabled thermostat. In an exemplary embodiment, a wireless-enabled thermostat generally includes a control having a wireless network interface that intermittently connects the thermostat in a wireless network in accordance with a duty cycle, the duty cycle having a connect time in which the thermostat is connected in the wireless network and a sleep time in which the thermostat is not connected in the wireless network.
|Intelligent over-current prevention|
A system, method, and/or computer program product comprises an input/output (i/o) bus and an intelligent current bank that couples a voltage source to the i/o bus. The intelligent current bank includes an ammeter that measures a real-time flow of current to the i/o bus.
|Adaptive digital pulse width modulation generator for buck converters|
Systems and methods are disclosed to control a buck converter by performing adaptive digital pulse width modulation (adpwm) with a plurality of upper power transistors each uniquely controlled to enable greater than 100% duty cycle for the buck converter and a lower power transistor coupled to the plurality of upper power transistors; and driving an inductor having one end coupled to the lower power transistor and the upper power transistors.. .
|External ramp autotuning for current mode control of switching converter|
Peak current, valley current or average current mode controlled power converters in either digital or analog implementations obtain a stabilized feedback loop and allow high system bandwidth design by use of an external ramp generator using a slope computation equation or design parameters based on fixing the quality factor of a double pole at one-half of the switching frequency at a desired value the slope of the external ramp waveform is tuned automatically with knowledge of the slope change in the waveform of inductor current of a power converter derived by differentiating a waveform in the current feedback loop. This autotuning of the external ramp generator provides immunity of quality factor change under variations of duty cycle, component values of topological change of the power converter..
|Intelligent over-current prevention|
A system, method, and/or computer program product comprises an input/output (i/o) bus and an intelligent current bank that couples a voltage source to the i/o bus. The intelligent current bank includes an ammeter that measures a real-time flow of current to the i/o bus.
|Controlling brightness of light sources used for data transmission|
A method includes receiving a transmitted code via visible light communication from a light source. The transmitted code is decoded using a translation table.
|Current detection circuit and switch regulator using the same|
In one embodiment, a current detection circuit configured to determine an input current and an output current of a switching regulator, can include: (i) a mirror circuit configured to mirror a current flowing through a main power transistor of the switching regulator to generate a sampling signal that is in proportion to the main power transistor current; (ii) a current generating circuit configured to perform a first average value calculation of the sampling signal based on a switching cycle of the switching regulator to determine the input current; and (iii) the current generating circuit being configured to perform a second average value calculation of the sampling signal based on a conduction duty cycle of the main power transistor to determine the output current.. .
|Electronic device with a duty cycle estimator|
A circuit in an electronic device coupled to a battery via a first pair of switches includes a logic unit and a filter. The logic unit receives a pulse width modulation (pwm) signal and a first signal, and generates a second signal according to the pwm signal and the first signal.
|Control panel, control method thereof and clothes treating apparatus having the same|
Disclosed are a control panel provided on an apparatus to control the apparatus, a control method thereof, and a clothes treating apparatus having the control panel. The control method includes the actions of receiving, at a clothes treating apparatus, a power supply command through a power input unit; and based on receiving power to the control panel, controlling a target light emission unit located on a panel body of the clothes treating apparatus.
|Electrically actuated variable pressure controll system|
An electrically-actuated variable pressure control system for use with flow-controlled liquid application systems. Direct acting solenoid valves are pulsed at varying frequencies and duty cycles0000change the resistance to flow encountered by the flow-controlled liquid application system.
|Power converter and power conversion method|
A power converter includes a switching circuit, a power conversion circuit that receives an input voltage via the switching circuit and converts the input voltage into an output voltage, an input voltage sense circuit that detects the input voltage and generates an input voltage sense signal, and a pwm controller that adjusts a duty cycle of the switching circuit based at least in part on the input voltage sense signal. The power converter also includes an output sense circuit that detects the output voltage and generates an output voltage sense signal, wherein the pwm controller adjusts the duty cycle of the switching circuit based at least in part on the input voltage sense signal and the output voltage sense signal..
|Syncless unit interval variation tolerant pwm receiver circuit, system and method|
A pwm receiver circuit receives and demodulates pulse width modulated (pwm) data signals without requiring synchronization such that no synchronization preamble need be provided with the pwm data signal. Embodiments may consume less power since there is no need to repeatedly synchronize a pll, counter or other circuitry to the pwm data signal.
|Power amplifier saturation detection|
In a portable radio transceiver, a power amplifier system includes a saturation detector that detects power amplifier saturation in response to duty cycle of the amplifier transistor collector voltage waveform. The saturation detection output signal can be used by a power control circuit to back off or reduce the amplification level of the power amplifier to avoid power amplifier control loop saturation..
|Silent start class-d amplifier|
A class-d amplifier includes a pre-amplifier having an input configured to receive an amplifier reference voltage signal which is ramped at start-up at a fast rate. An integrator has a first input configured to receive an input signal from the pre-amplifier and a second input configured to receive an integrator reference voltage signal which is ramped at start-up at a slower rate.
|Adjustable voltage output device and adjustment method of operating voltage|
This disclosure relates to an adjustable voltage output device and an adjustment method of an operating voltage, in which the adjustable voltage output device utilizes a basic input/output system for adjusting the duty cycle of the pulse width modulation (pwm) signal outputted by the pwm signal generation unit, so as to change the operating voltage outputted by the voltage generation unit.. .
|Method and system for monitoring the progressive charging of an automobile alternator, and automobile alternator comprising such a system|
The method according to the invention involves limiting the charging of a vehicle alternator by only authorizing progressive augmentation of a current duty cycle (dc) of an excitation signal (7) of the alternator from an initial duty cycle to an expected duty cycle (epsu) calculated by a control loop (1, 5, 6) of the alternator. According to the invention, a complementary limitation of the charging of the alternator involves limiting the increase of the current duty cycle (dc) according to at least one parameter of the heat engine involving an angular acceleration (mot) and/or a rotation speed (nmot) of the heat motor.
|Method and apparatus for regulating the brightness of light-emitting diodes|
Embodiments of the present invention relate to methods and circuits for brightness regulation for at least one light-emitting diode in the field of general lighting, more particularly, for incandescent lamp replacement by means of a supply voltage comprising a brightness level signal, wherein the brightness level signal contained in the supply voltage is decoded and converted into a modulation signal with a duty cycle corresponding to the brightness level signal for the purpose of driving a driver circuit for the at least one light-emitting diode.. .
|Efficient external charger for an implantable medical device optimized for fast charging and constrained by an implant power dissipation limit|
An external charger for a battery in an implantable medical device and charging techniques are disclosed. Simulation data is used to model the power dissipation of the charging circuitry in the implant at varying levels of implant power.
|Crest-factor control of phase-shifted inverter|
A method for controlling an electrosurgical generator includes generating at least one electrosurgical waveform at a selected energy setting through an rf output stage comprising an rf inverter coupled to a power source. The at least one electrosurgical waveform has a duty cycle and a crest factor.
|Device and method for improved safety and efficacy for cryoablation|
A method and system for improved lesion creation. The method generally includes positioning a treatment element of a medical device proximate an area of target tissue and operating a control unit in accordance with a duty cycle, that includes at least one freeze-warm cycle, each freeze-warm cycle including: supplying coolant to the treatment element at a first flow rate that causes the treatment element to reach a first temperature, the first temperature causing ablation of the target tissue and cryoadhesion between the treatment element and target tissue, and supplying coolant to the treatment element at a second flow rate that causes the treatment element to reach a second temperature, the second temperature being higher than the first temperature and the second flow rate being lower than the first flow rate, the second temperature being above a temperature at which ablation occurs and below a temperature at which cryoadhesion is broken..
|Low power audio trigger via intermittent sampling|
Systems and methods may provide for using an audio front end of a mobile device to sampled audio from an audio signal during a first portion of a periodic detection window, and reducing a power consumption of one or more components of the audio front end during a second portion of the periodic detection window. Additionally, a determination may be made as to whether voice activity is present in the audio signal based at least in part on the sampled audio.
|Pulsed line beams|
Processes such as annealing amorphous silicon to form polysilicon use exposures to pulsed laser beams provided by laser diodes or arrays of laser diodes. An optical beam based on plurality of beams from respective laser diodes is shaped and directed to a substrate.
|High sample rate dpes to improve contact detection signal to noise ratio|
Using a high sample rate dpes, together with pulsed heater and lock-in technique, to improve dpes snr for contact detection between the head and media surface. Steps of powering a transducing head actuator with pulsed input signal at a select data track offset from a previously-written to data track of the storage medium, where the pulsed input signal has select amplitude and duty cycle to simulate a response signal, and further locking in an amplitude with respect to the heater frequency, can lead to a determination of level of heater power for initiating contact between the transducing head and the storage medium..
|Single stage boost-asymmetric llc|
An ac/dc power converter utilizing a single stage boost-asymmetric llc topology is disclosed. The converter uses a combined pulse width modulation (pwm) and frequency modulation (fm) to achieve dual control for a single main magnetic element (transformer).
|Inground device with advanced transmit power control and associated methods|
An inground housing supports a transmitter for receiving electrical power from a battery. The transmitter transmits at least one signal using at least two different transmit power levels for at least one of locating the transmitter and characterizing an orientation of the transmitter.
|Methods, systems and devices for electronic article surveillance deactivation having randomized transmission rates|
Methods, systems and devices for providing an interrogation signal from a handheld deactivation device for identifying a security tag. Identifying the security tag includes initiating an interrogation signal, wherein the interrogation signal includes plurality of transmission bursts and a plurality of random time periods to wait between transmission bursts such that a unique time period elapses between each of the plurality of transmission bursts.
|Digital duty cycle correction circuit|
A digital duty cycle correction circuit includes a duty cycle controller and a digital duty control code generator. The duty cycle controller generates first and second output clock signals by compensating duty cycles of first and second input clock signals based on a digital duty control code.
|Duty cycle correction circuit|
In an embodiment, a duty cycle correction circuit comprises a first set of inverters connected in series, a first filter, a first feedback circuit and a second feedback circuit. A first inverter in the series is configured to receive a clock signal and a last inverter in the series is configured to provide a first output clock signal.
|Duty cycle corrector|
The duty cycle corrector for correcting a system clock signal comprises a duty cycle detector and a duty cycle adjuster. The duty cycle detector is configured for detecting a system duty cycle of the system clock signal and generating the first control signal and the second control signal, wherein the first control signal and the second control signal are complementary to each other.
|Clock cycle compensator and the method thereof|
One aspect of the present invention is to provide a method for compensating a system duty cycle of a system clock signal. The method in one embodiment comprises the following steps: locking a duty cycle center of the system duty cycle by a delay lock loop; detecting a current system duty cycle of the system clock signal; determining a duty cycle correction amount, wherein the duty cycle correction amount is a gap of the current system duty cycle from a target duty cycle; and changing a polarity of an input reference clock signal according to whether the duty cycle correction amount exceed a threshold amount or not..
|Electrical power steering phase voltage output diagnosis|
A motor control diagnostic apparatus is provided. The apparatus includes a control module in communication with a multiple phase electric power steering motor, the control module configured to generate multiple phase duty cycle outputs based on a voltage command generated from a motor torque command and motor position.
|Method and system for regulating battery voltages in handheld/portable electronic systems|
A power supply circuit (1) for powering a load device (10) with the requirements of a high power burst at a low duty cycle. The power circuitry includes; a power source (2), a voltage comparator (3) which makes sure that the power source has enough power for the system, a series boost regulator (5) which delivers a higher voltage to the capacitor (7), a switching buck/boost regulator (8) which receives the voltage from the capacitor and regulates the higher or lower voltage to the load device..
|Systems and methods for 100 percent duty cycle in switching regulators|
The present disclosure includes systems and methods for 100% duty cycle in switching regulators. A switching regulator circuit includes a ramp generator to produce a ramp signal having a period and a comparator to receive the ramp signal and an error signal, and in accordance therewith, produce a modulation signal.
|Duty-cycle dependent slope compensation for a current mode switching regulator|
An electronic circuit may output a slope compensation signal for performance of slope compensation of a current mode switching regulator. The circuit may generate a voltage across a storage device that is supplied to a voltage-to-current converter, which may generate a first current in response to the supplied voltage.
|Method and implementation for eliminating random pulse during power up of digital signal controller|
A switching mode power converter includes a dsc with a digital pwm module configured for complementary operation mode during normal operation. The control algorithm of the dsc is configured such that during an initialization stage immediately following power up of the device relevant digital pwm modules used for interleaving operation are reconfigured to temporarily operate in an independent operation mode with the duty cycle associated with each channel set at zero.
|Sine modified trapezoidal drive for brushless dc motors|
A pulse width modulated (pwm) trapezoidal commutation drive to a brushless direct current (bldc) motor is sine modified so that the applied drive voltage substantially matches the induced voltage generated in the bldc motor. The values of the cosine of the angles between −30 degrees and +30 degrees are used to modify the duty cycle of the pwm drive signal dependent upon the rotor angular positions determined from the times between the zero crossing bemf voltages measured at the unconnected motor terminals..
|Three phase brushless dc motor sensor-less control using sinusoidal drive method and apparatus|
Back electromotive force (bemf) of a brushless dc (bldc) motor may be determined when using continuous sinusoidal drive by computing the voltage to common (ground) of each phase (3) thereof when a phase current is substantially zero. These phase voltages may be computed from the dc supply voltage and the duty cycle of the pulse width modulation (pwm) drive to each of the motor phases.
|Lighting system with reduced physioneural compression and associate methods|
A system for generating light with reduced physioneural compression. The system includes a first light source operable to emit light within a first wavelength range corresponding to a first photoreceptor and a second light source operable to emit light within a second wavelength range corresponding to a second photoreceptor.
|Methods and apparatus for lighting effects in a moving medium|
A device for creating moving light effects has a light source that is configured to pulse a light on and off according to a desired pattern so as to create a moving light effect that is visible when the light source is moved. Some such devices can be programmed to custom-select color sets that are pulsed on and off according to the desired pattern.
|Multiple power outputs generated from a single current source|
A system includes a power converter that is configured to supply current to a plurality of output loads connected in series. At least one of the output loads is connected in parallel with a switch that switches in accordance with a duty cycle.
|Constant brightness led drive communications port|
A light emitting diode (led) is driven with a plurality of pulses having controllable pulse widths and positions within clock time periods that provide for both led light intensity control and digital information communications from a single output node of an integrated circuit (ic) device. The led light intensity is determined by the duty cycle of the pulses where the human eye integrates these light pulses from the led into continuous light intensity levels.