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Frequency Detector patents

      

This page is updated frequently with new Frequency Detector-related patent applications.




 Charge pump circuit for a phase locked loop patent thumbnailCharge pump circuit for a phase locked loop
Disclosed herein is a circuit including a phase frequency detector (pfd) configured to compare phases of an input signal and a feedback signal, and to generate first and second control signals as a function of that comparison. An attenuation circuit includes a capacitor coupled in series between a node and a switching node, and is configured to charge the capacitor and disconnect the switching node from ground based on assertion of the first control signal, and discharge the capacitor and connect the switching node to ground based on assertion of the second control signal..
Stmicroelectronics International N.v.


 Phase locked loop with low phase-noise patent thumbnailPhase locked loop with low phase-noise
A low phase-noise phase locked loop (pll). In an embodiment, the pll includes a charge pump that includes a first switch, a second switch, a first resistor and a second resistor, which are connected in series.
Aura Semiconductor Pvt. Ltd


 Reducing errors due to non-linearities caused by a phase frequency detector of a phase locked loop patent thumbnailReducing errors due to non-linearities caused by a phase frequency detector of a phase locked loop
A phase frequency detector (pfd) includes a first circuit portion and a second circuit portion. The first circuit portion receives a reference signal and activates a first error signal if the phase of the reference frequency leads the phase of a feedback signal.
Aura Semiconductor Pvt. Ltd


 Phase-locked loop with lower power charge pump patent thumbnailPhase-locked loop with lower power charge pump
Described is a phase-locked loop with lower power charge pump. The phase-locked loop comprises: a phase frequency detector to compare a reference clock and a feedback clock and generate a pulse based on the comparison, a charge pump to provide a charge signal corresponding to the pulse, a bias generator to provide biasing for the charge pump, wherein the bias generator is operable to receive a bias enable signal from the phase frequency detector and the bias generator is disabled when the bias enable signal is not asserted, a loop filter coupled to the output of the charge pump to provide a control signal responsive to the charge signal, and a voltage-controlled oscillator (vco), wherein the oscillating frequency of the vco is controlled by the control signal..
Intel Corporation


 Frequency detector and oscillator circuit patent thumbnailFrequency detector and oscillator circuit
frequency detector and oscillator circuits are disclosed. Example frequency detector and oscillator circuits disclosed herein include a current approximation circuit coupled to an external clock operating at a target frequency.
Texas Instruments Incorporated


 Multiplex detector signal boosters patent thumbnailMultiplex detector signal boosters
A signal booster may include a first path that may include a first tap circuit. The first path may be coupled between a first port and a second port and may be configured to amplify a first signal.
Wilson Electronics, Llc


 Gear shifting from binary phase detector to pam phase detector in cdr architecture patent thumbnailGear shifting from binary phase detector to pam phase detector in cdr architecture
A device and method for providing clock data recovery (cdr) in a receiver is disclosed. The method comprises receiving a phase amplitude modulation (pam) signal; on startup, using a non-return-to-zero (nrz)-based phase frequency detector (pfd) to acquire signal frequency from the received pam signal; and responsive to a determination, switching to a pam phase detector (pd) for steady state operation..
Texas Instruments Incorporated


 Detecting, tracking, and decoding pulse repetition frequency laser energy from laser designators patent thumbnailDetecting, tracking, and decoding pulse repetition frequency laser energy from laser designators
A pulse repetition frequency detector, tracker, and decoder includes a two-dimensional ingaas fpa of photodetectors configured to convert laser signals into electrical signals. A roic is operatively connected to the ingaas fpa to condition electrical signals from the ingaas fpa.
Sensors Unlimited, Inc.


 Systems and methods for a predistortion linearizer with frequency compensation patent thumbnailSystems and methods for a predistortion linearizer with frequency compensation
An analog predistortion linearizer system with dynamic frequency compensation for automatically adjusting predistortion characteristics based on a detected frequency includes a frequency detector configured to generate at least one frequency detection signal in response to receiving an amplifier drive signal, the frequency detection signal including a frequency indicator that indicates the frequency of the amplifier drive signal. Moreover, the system also includes a controller communicatively coupled to the frequency detector and configured to generate a predistorter control signal in response to receiving the frequency detection signal from the frequency detector, and a predistorter communicatively coupled to i) the frequency detector and ii) the controller, the predistorter configured to generate a predistorted amplifier drive signal based on at least the predistorter control signal..
Mission Microwave Technologies Inc.


 Signal booster for a controllable antenna system patent thumbnailSignal booster for a controllable antenna system
A controllable antenna system is disclosed. The system comprises a directional antenna configured to be directed in a selected direction.
Wilson Electronics, Llc


Apparatus for determining or monitoring the fill level of a medium in a container

An apparatus for determining or monitoring the fill level or a predetermined limit level of a medium in a container, comprising a self excited system comprising an oscillation producing unit for producing electromagnetic waves within a predetermined frequency band; at least one sensor having an electrode, wherein the sensor is arranged at a predetermined angle to the longitudinal axis of the container, wherein the electrode is supplied with the electromagnetic waves, wherein the at least one sensor is arranged relative to the medium in such a manner that the phase of the electromagnetic waves reflected at the interface of the medium changes under the influence of the medium; and a feedback loop, which feeds the electromagnetic waves back to the at least one sensor, whereby the frequency of the self excited system is determined, a frequency detector, which registers the frequency of the electromagnetic waves, and an evaluation unit, which based on the registered frequency ascertains the relative dielectric constant and/or the permeability of the medium dependent on the respective fill level and based on the ascertained relative dielectric constant or the permeability of the medium determines the fill level or the reaching of the predetermined limit level of the medium in the container.. .
Endress+hauser Gmbh+co. Kg

Phase locked loop with sub-harmonic locking prevention functionality

Embodiments relate to type-i plls that do not lock at a sub-harmonic frequency of a reference clock signal by controlling timing of charging or discharging of one or more capacitors in the plls. A phase frequency detector (pfd) of a type-i pll can prevent sub-harmonic locking by generating a clear output signal to cause a sampling capacitor of pll's loop filter to discharge only during a time period when the sampling capacitor is not being charged.
Lattice Semiconductor Corporation

Servo controller for measuring lubrication characteristics of a machine by experimental modal analysis

A servo controller includes: a sinusoidal wave disturbance input unit for supplying a sinusoidal wave disturbance to a speed control loop including a speed command generator, a torque command generator and a speed detector; a frequency response calculator for estimating the gain and phase from the output of the speed control loop; a resonance frequency detector for detecting resonance frequencies at which the gain becomes maximum; a resonance mode characteristics analyzer for estimating resonance characteristics from the frequency response; and, a reference modal damping ratio retainer for retaining a reference modal damping ratio as a resonance characteristic corresponding to the reference lubricating condition, and the resonance mode characteristics analyzer calculates lubrication characteristics on the basis of the reference modal damping ratio and the measured modal damping ratio at the resonance frequency corresponding to the reference modal damping ratio.. .
Fanuc Corporation

Gear shifting from binary phase detector to pam phase detector in cdr architecture

A device and method for providing clock data recovery (cdr) in a receiver is disclosed. The method comprises receiving a phase amplitude modulation (pam) signal; on startup, using a non-return-to-zero (nrz)-based phase frequency detector (pfd) to acquire signal frequency from the received pam signal; and responsive to a determination, switching to a pam phase detector (pd) for steady state operation..
Texas Instruments Incorporated

High performance phase frequency detectors

A phase frequency detector with two stages of operation; each stage containing two d flip-flops. Each d flip-flop is interconnected to eliminate detection dead zone while avoiding glitches and incorrect output conditions for fast phase locked loop convergence and wide-band applications..
Wright State University

Apparatus and detecting phase lock in an electronic device

The present disclosure provides a method and a phase lock detection apparatus for detecting whether a phase of an output signal is locked to the phase of a reference signal. The apparatus includes a first divider that individually frequency-divides first and second pulse signals, a phase frequency detector that outputs third and fourth pulse signals that correspond to a phase difference between the frequency-divided first and second pulse signals, a second divider that individually frequency-divides the third and fourth pulse signals, and a determiner that determines whether a phase of the second pulse signal is locked, based on the frequency-divided third and fourth pulse signals..
Samsung Electronics Co., Ltd

Apparatus and combining multiple charge pumps in phase locked loops

A frequency synthesizer includes circuitry configured to generate two or more feedback clocks based on the oscillation signals output from a voltage-controlled oscillator. The circuitry also modulates the feedback clocks based on fractional offsets from a reference clock frequency for input into two or more phase and frequency detectors.
Broadcom Corporation

Eeg-based brain-machine interface recognizing human-intention using flickering visual stimulus

A brain-machine interface apparatus and a method of the same are provided. To elaborate the brain-machine interface apparatus may include a display where a plurality of light-emitting points (or lines) flickering with their individual set frequencies are arranged a flickering controller that divides the plurality of the light-emitting points (or lines) into a plurality of groups, and sets the set frequencies for the groups; an eeg measurement unit that detects eeg signals of a user who watches the display without gaze-shift; a frequency detector that detects one or more (their harmonic or combination) frequency components from the measured eeg signals; a shape analysis unit that decodes an originally intended shape according to the user's imagination based on the one or more detected frequency components and the set frequencies; and a result output unit that outputs information of the embodied originally intended shape..
Korea University Research And Business Foundation

Dynamic measurement of frequency synthesizer noise spurs or phase noise

A method of measuring phase noise (pn). A pll frequency synthesizer is provided including a first phase frequency detector (pfd) receiving a reference frequency signal coupled to a first charge pump (cp) coupled to a vco having an output fedback to the first pfd through a feedback divider that provides a divided frequency signal to the first pfd which outputs an error signal, and pn measurement circuitry including a replica cp coupled to an output of a second pfd or the first pfd.

Differential phase-frequency detector

A phase-frequency detector (pfd) is electrically coupled to a charge pump of a phase-locked-loop (pll). The pfd includes a first differential latch electrically coupled to the charge pump.
International Business Machines Corporation

Signal acquisition and distance variation measurement system for laser ranging interferometers

A signal acquisition and distance variation measurement system for laser ranging interferometers comprising a signal acquisition unit. This unit comprises a frequency detection subsystem to detect the frequency of a received laser beam measurement signal which is buried in noise, wherein the subsystem comprises an acquisition subsystem with a wavelet packet decomposition unit and a phase/frequency detector pll; a main pll unit being coupled to the frequency detection subsystem for receiving the detected frequency of the measurement signal for phase estimation of the measurement signal; and a phasemeter band detection subsystem for detecting whether the measurement signal frequency is higher or lower than a reference signal frequency of a reference laser beam by operating a known change to the frequency of the reference signal and measuring the consequent change in the frequency of an interference signal for having the phase of reference signal locked to the measurement signal phase..
Airbus Ds Gmbh

Electric brake device

A brake device includes a control device which performs feedback control using a braking force of a linear motion mechanism as a controlled variable. The control device includes a computing unit for computing an operating quantity (voltage applied to an electric motor) for canceling out fluctuations in braking force, and a frequency detector for detecting the frequency of the operating quantity.
Ntn Corporation

Transmitting and receiving digital and analog signals across an isolator using amplitude modulation

Various embodiments of systems for transmitting and receiving a plurality of signals across an isolation material are disclosed. In one embodiment, a first signal may be modulated into a first modulated signal.
Avago Technologies General Ip (singapore) Pte. Ltd.

Phase frequency detector (pfd) circuit with improved lock time

Described examples include circuitry and methods to control lock time of a phase lock loop (pll) or other locking circuit, in which a phase frequency detector (pfd) circuit is switched from a first mode to provide a control input signal to a charge pump as a pulse signal having a pulse width corresponding to a phase difference between a reference clock signal and a feedback clock signal to a second mode to hold the control input signal at a constant value for a predetermined time in response to detected cycle slip conditions to enhance loop filter current during frequency transitions to reduce lock time for the locking circuit.. .

Integrated circuit capacitors for analog microcircuits

Dual gate fd-soi transistors are used as mosfet capacitors to replace passive well capacitors in analog microcircuits. Use of the dual gate fd-soi devices helps to reduce unstable oscillations and improve circuit performance.

Microelectromechanical device having an oscillating mass and a forcing stage, and controlling a microelectromechanical device

A microelectromechanical device includes: a body; a movable mass, elastically coupled to the body and oscillatable with respect to the body according to a degree of freedom; a frequency detector, configured to detect a current oscillation frequency of the movable mass; and a forcing stage, capacitively coupled to the movable mass and configured to provide energy to the movable mass through forcing signals having a forcing frequency equal to the current oscillation frequency detected by the frequency detector, at least in a first transient operating condition.. .

Conveyor belt measuring system

A conveyor belt and a sensing system for sensing various conditions on a conveyor belt. The belt includes an array of sensing elements embedded in the belt to measure belt conditions.

Clock monitor and system on chip including the same

A system on chip includes a plurality of function blocks configured to perform predetermined functions, respectively, a clock control unit configured to generate a plurality of operating clock signals that are provided to the plurality of function blocks, respectively, a clock monitor configured to monitor frequencies of the operating clock signals to generate an interrupt signal, and a processor configured to control the frequencies of the operating clock signals based on the interrupt signal. The clock monitor includes a selector configured to select one of the operating clock signals to provide a selected clock signal, a frequency detector configured to detect a frequency of the selected clock signal to provide a detection frequency, and an interrupt generator configured to generate the interrupt signal based on the detection frequency, where the interrupt signal indicates a frequency abnormality of the operating clock signal corresponding to the selected clock signal..
Samsung Electronics Co., Ltd.

Rf circuit

An rf circuit for providing phase coherent signals, an rf heating apparatus comprising the rf circuit and a method for providing phase coherent signals in an rf circuit. The rf circuit has a first frequency synthesiser including a fractional-n phase locked loop and a second frequency synthesiser including an integer-n phase locked loop.
Nxp B.v.

Integrated circuit with distributed clock tampering detectors

A circuit configuration for secure application includes several internal frequency detectors arranged in digital units at critical points of an integrated circuit. The clock detectors are concealed in the digital part of the integrated circuit each as a standard cell (flip-flop unit) in order to prevent any external manipulation and in order to hide its function.
Em Microelectronic-marin Sa

Display apparatus and driving the display apparatus

A display apparatus includes an image analyzer that analyzes image data and outputs an interrupt signal at a period during which the image data of a low frequency change to the image data of a high frequency, a frequency detector that detects the high frequency, a frame rate controller that outputs a vertical synch signal of the high frequency in response to the interrupt signal, a polarity compensation controller that determines a last frame of the low frequency based on an interrupt period at which the interrupt signal is generated, generates a reversed polarity signal with respect to a polarity signal of the last frame and outputs the reversed polarity signal during a polarity compensation period close to the interrupt period, and a data driver circuit that outputs a data signal based on the reversed polarity signal to a data line during the polarity compensation period.. .
Samsung Display Co., Ltd.

Rotary speed sensor

The present utility model relates to a rotary speed sensor, comprising at least one sensor element (1), an analog signal processing block (2), a digital core (5) and a digital output end (10), wherein the analog signal processing block (2) comprises an analog signal regulating block (3) and an analog comparator (4), the digital core (5) comprises a digital signal processing means (7), wherein the digital core (5) additionally comprises a frequency detector (6), for detecting a frequency of a magnetic input signal of the rotary speed sensor, so that when the frequency is greater than a predetermined frequency, a time continuous signal path comprising the analog signal processing block (2) is formed, and when the frequency is smaller than a predetermined frequency, a time discrete digital signal path comprising the digital signal processing means (7) is formed.. .
Infineon Technologies Ag

Referenceless clock recovery circuit with wide frequency acquisition range

A full-rate referenceless clock-data recovery architecture with neither a frequency detector nor a lock detector that allows both frequency and phase locking in a single loop. According to one embodiment, a referenceless clock data recovery (cdr) circuit, comprises a digital control circuit (dcc), a phase and strobe point detector circuit (pspd), and an lc voltage control oscillator (lc vco) electrically coupled to the pspd and dcc such that a frequency of the lc vco decreases when a negative strobe point is detected and an initial frequency of the lc vco is higher than an input data bit rate..
The Regents Of The University Of California

Circuits and methods for eliminating reference spurs in fractional-n frequency synthesis

Disclosed are circuits and method for reducing or eliminating reference spurs in frequency synthesizers. In some implementations, a phase-locked loop (pll) such as a frac-n pll of a frequency synthesizer can include a phase frequency detector (pfd) configured to receive a reference signal and a feedback signal.
Skyworks Solutions, Inc.

Fast acquisition frequency detector

A phase-frequency detector (pfd) circuit that includes a binary phase detector and a ternary phase detector coupled to the binary phase detector. The binary phase detector is configured to, based on the pfd circuit being in a frequency acquisition state, compare a clock signal with a data signal and output up and down signals based on the comparison.
Texas Instruments Incorporated

Position detection apparatus of micro-electromechanical system and detection method thereof

A position detection apparatus for detecting position information of a micro-electromechanical system apparatus includes an oscillating circuit, a carrier frequency detector, and a demodulator. The oscillating circuit generates an oscillating signal according to an equivalent capacitance provided by the micro-electromechanical system apparatus.
Lite-on Technology Corporation

Broadband frequency detector

Provided is a broadband frequency detector, more particularly, to a frequency detector detecting all the signals for guiding the safe vehicle operation, and radar signals for determining vehicle speeds. The broadband frequency detector comprises: a horn antenna configured to receive signals having specific frequencies; a first amplifier configured to receive the signals having specific frequencies from the horn antenna; a mixer unit configured to receive signals from the first amplifier, wherein the signals are low noise amplified therein; and a second amplifier, arranged in parallel with the amplifier, for transferring signals to the mixer unit after low noise amplifying the signal received from the horn antenna, wherein the second amplifier includes a transistor and a first microwave circuit unit for matching the impedance of the horn antenna and the impedance of the transistor..
Djp Co., Ltd.

Apparatus and methods for tuning a voltage controlled oscillator

Apparatus and methods for tuning a voltage controlled oscillator (vco) are provided. In one aspect, a method of auto-tuning in a phase-locked loop includes generating a vco clock signal using a vco coupled to a capacitor array, dividing the vco clock signal to generate a divided clock signal using a prescaler circuit having a selectable division ratio, controlling a value of the selectable division ratio using a first counter and a second counter of a counter module, generating a phase-frequency detector feedback signal based on a division control signal m and the divided clock signal using the counter module, counting a number of cycles of the divided clock signal that occur during a calibration interval using a cycle counter of a digital processing logic circuit, and determining the value of a capacitor array control signal based on the number of cycles counted during the calibration interval..
Skyworks Solutions, Inc.

Method for suppression of spurs from a free running oscillator in frequency division duplex (fdd) and time division duplex (tdd) wireless systems

Embodiments of this disclosure include methods in which spurs generated by the drifting of an oscillation frequency of an oscillation signal provided by a free-running oscillator may be minimized and/or eliminated from an output signal of a phase locked loop (pll). Methods include minimizing the mixing gain between the oscillation signal and a power signal provided to the pll.
Broadcom Corporation

Systems and methods for use in authenticating an object

A system for use in authenticating an object is provided. The system includes a radio-frequency identification tag coupled to the object and an interrogation system.
The Boeing Company

Low spurious synthesizer circuit and method

An offset phase locked loop synthesizer comprising: an input; an output; a voltage controlled oscillator (vco), the vco output coupled to the synthesizer output; a phase frequency detector having a reference input, a feed-back input, and an output; a mixer having a first mixer input coupled to the synthesizer input and a second mixer input coupled to the vco output; a first divider for frequency dividing a signal by a first value and having an input coupled to the mixer output and an output coupled to the second input of the phase frequency detector; a second divider for frequency dividing a signal by a second value and having an input coupled to the synthesizer input and an output coupled to the reference input of the phase frequency detector; and a low pass filter coupled between the output of the phase frequency detector and the vco input.. .
Nanowave Technologies Inc.

Broadband frequency detector

Provided is a broadband frequency detector, more particularly, to a frequency detector detecting all the signals for guiding the safe vehicle operation, and radar signals for determining vehicle speeds. The broadband frequency detector comprises: a horn antenna configured to receive signals having specific frequencies; a first amplifier configured to receive the signals having specific frequencies from the horn antenna; a mixer unit configured to receive signals from the first amplifier, wherein the signals are low noise amplified therein; and a second amplifier, arranged in parallel with the amplifier, for transferring signals to the mixer unit after low noise amplifying the signal received from the horn antenna, wherein the second amplifier includes a transistor..
Djp Co., Ltd.,

Weighing system using a conveyor belt

Either the capacitor or the inductive coil can be a force-sensitive element. Measuring circuits external to the belt include an oscillator having a coil that inductively couples to the resonant circuit in the belt as it passes closely by.

Phase locked loop having dual bandwidth and operating the same

A phase locked loop having a dual bandwidth is disclosed. The phase locked loop divides a loop filter into a zero filter and a pole filter, disposes the zero filter in front of a phase-frequency detector (pfd), and performs high-pass filtering on a voltage-controlled oscillator (vco) noise with a maximum bandwidth and performs low-pass filtering on a charge pump noise (cp noise) with a minimum bandwidth to divide the vco noise and the cp noise..

Portable mri imaging and tissue analysis

The present invention discloses a portable magnetic resonance method and device for tissue analysis including a magnetic field generator, a radio frequency source, a radio frequency detector, a power source, and a processor configured for receiving radio frequency signals and for analyzing those signals to determine discriminatory tissue characteristics in a planar section of a region of interest within a patient's body, with the magnetic field generator positioned outside of the patient's body, and more preferably hand held in proximity to the patient's body. The processor is configured to direct the radio frequency source to produce a radio frequency field in varying planar sections of the region of interest at larmor frequencies such that spins resonant with the larmor frequency in the particular planar section of the region of interest are excited.

Referenceless clock and data recovery circuit

A circuit and method for referenceless cdr with improved efficiency and jitter tolerance by using an additional loop for frequency detection. Such an improved circuit includes a frequency detector for identifying whether an initial recovered clock signal is faster or slower than the actual bit rate of the received data stream.
Stmicroelectronics International N.v.

Integrated circuit capacitors for analog microcircuits

Dual gate fd-soi transistors are used as mosfet capacitors to replace passive well capacitors in analog microcircuits. Use of the dual gate fd-soi devices helps to reduce unstable oscillations and improve circuit performance.
Stmicroelectronics International N.v.

Broadband frequency detector

A frequency detector detecting all the signals for guiding the safe vehicle operation, and radar signals for determining vehicle speeds. The broadband frequency detector comprises: a horn antenna configured to receive signals having specific frequencies; a first amplifier configured to receive the signals having specific frequencies from the horn antenna; a mixer unit configured to receive signals from the first amplifier, wherein the signals are low noise amplified therein; and a second amplifier, arranged in parallel with the amplifier, for transferring signals to the mixer unit after low noise amplifying the signal received from the horn antenna..
Djp Co., Ltd.

Power conversion device and power conversion method

A transformer steps down an input ac power, and supplies the ac power to a converter. The primary voltage of the transformer detected by a voltage detector is supplied to a converter controller and a frequency detector via a bpf.
Mitsubishi Electric Corporation

Don-doff detection using antenna detuning

A wearable device having corresponding computer-readable media comprises: an antenna; a radio-frequency transmitter configured to provide radio-frequency signals to the antenna; a radio-frequency detector having an input electrically coupled to the antenna; an analog-to-digital converter electrically coupled to an output of the radio-frequency detector; and a controller configured to determine whether the wearable device is being worn based on an output of the analog-to-digital converter.. .
Plantronics, Inc.

Broadband frequency detector

A broadband frequency detector detecting all the signals for guiding the safe vehicle operation, and radar signals for determining vehicle speeds comprises: a horn antenna configured to receive signals having specific frequencies; an amplifier configured to receive the signals having specific frequencies from the horn antenna; a mixer unit configured to receive signals from the amplifier, wherein the signals are low noise amplified therein; a coupler, arranged in parallel with the amplifier, for transferring the signals to the mixer unit by passing through the signals within a specific frequency range among the signals received from the horn antenna.. .
Djp Co., Ltd.



Frequency Detector topics:
  • Frequency Detector
  • Loop Filter
  • Reference Voltage
  • Frequency Divider
  • Generates A Frequency
  • Feedback Signal
  • State Machine
  • Peripheral Devices
  • Synthesizer
  • Calibration
  • Frequency Band
  • Wireless Communication Device
  • Low Frequency
  • Synchronization
  • Phase Shift


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    This listing is a sample listing of patent applications related to Frequency Detector for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Frequency Detector with additional patents listed. Browse our RSS directory or Search for other possible listings.


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