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8957705 Phase frequency detector  
Described is an apparatus comprising: a first phase frequency detector (PFD) to determine a coarse phase difference between a first clock signal and a second clock signal, the first PFD to...
8947167 Reference-less frequency detector  
Embodiments provide a reference-less frequency detector that overcomes the “dead zone” problem of conventional circuits. In particular, the frequency detector is able to accurately resolve the...
8896348 Semiconductor apparatus  
In a semiconductor device, there are provided first to third pairs of nMOS transistors between a GND and two sense nodes and first to third pairs of pMOS transistors between the two sense nodes...
8866511 Matrix phase detector  
A method and a system are provided for clock phase detection. A first set of delayed versions of a first clock signal is generated and a second set of delayed versions of a second clock signal is...
8866517 Power system data acquisition systems  
A system comprising an interface configured to condition a signal associated with a power system; a clock module configured to generate a synchronization signal; and a module coupled to the...
8823564 Sampling circuit, A/D converter, D/A converter, and codec  
A sampling circuit includes a continuous section which is a circuit for transmitting a continuous signal; a digital section for transmitting a signal which is sampled and quantized; and a sampling...
8610476 Apparatus and methods for lock detection for semi-digital and fully-digital clock data recovery  
One embodiment relates to a lock detection circuit. The lock detection circuit includes at least a dither detection circuit and a lock filter. The dither detection circuit maintains a...
8604835 Semiconductor apparatus  
In a semiconductor device, there are provided first to third pairs of nMOS transistors between a GND and two sense nodes and first to third pairs of pMOS transistors between the two sense nodes...
8502609 Reference-less frequency detector  
Embodiments provide a reference-less frequency detector that overcomes the “dead zone” problem of conventional circuits. In particular, the frequency detector is able to accurately resolve the...
8497708 Fractional-rate phase frequency detector  
A phase frequency detector detects the difference between the edges of a fractional-rate recovered clock signal and the edges within a serial data bit stream, where the edges within the serial...
8302054 Retiming of multirate system  
Methods and apparatuses for retiming of multirate system for clock period minimization with a polynomial time without sub-optimality. In an embodiment, a normalized factor vector for the nodes of...
8207770 Digital phase lock loop  
An apparatus may comprise a time-to-digital circuit architecture. Other embodiments are described and claimed.
8111106 Switched phase and frequency detector based DPLL circuit with excellent wander and jitter performance and fast frequency acquisition  
Some embodiments of the present invention may include a DPLL circuit comprising a firmware. The firmware may comprise a re-sampled NCO phase detector capable of receiving a reference clock timing...
7795926 Phase detector for half-rate bang-bang CDR circuit  
A phase detector, including a sampling device, a comparing device, and an output device, is provided. The sampling device samples a data signal according to a plurality of clock signals, so as to...
7764088 Frequency detection circuit and detection method for clock data recovery circuit  
A frequency detection circuit and a detection method thereof suitable for a clock data recovery (CDR) circuit are provided. The frequency detection circuit includes a phase detector, a first...
7764759 Linear sample and hold phase detector for clocking circuits  
Linear sample and hold phase detectors are disclosed herein. An example phase detector is coupled to an input data signal and a recovered clock signal and includes a linear phase difference...
7755397 Methods and apparatus for digital phase detection with improved frequency locking  
Methods and apparatus are provided for digital phase detection with improved frequency locking. A phase detector is disclosed for evaluating a phase difference between a clock signal and a...
7692501 Phase/frequency detector and charge pump architecture for referenceless clock and data recovery (CDR) applications  
A stream of data may flow over a fiber or other medium without any accompanying clock signal. The receiving device may then be required to process this data synchronously. Embodiments describe...
7671671 Device and method for the demodulation of modulated electric signals  
A demodulation device (1) in semiconductor technology is disclosed. The device (1) is capable of demodulating an injected modulated current. The device (1) comprises an input node (IN1), a...
7586335 Digital phase detector and a method for the generation of a digital phase detection signal  
The present invention concerns a digital phase detector (PD) and also a method for digital phase detection, as can in particular be used e.g. in a so-called phase locked loop (PLL). According to...
7501861 Phase-difference detecting apparatus and method  
A phase-difference detecting method is for detecting phase difference between a first signal and a second signal of the same frequency. First, generate a detection signal. Next, sample the...
7376201 System and method for reducing crest factor of signal  
A new system and method is developed for reducing the crest factor of a signal. The system includes a large signal extraction module for receiving the input signal and the magnitude of the input...
7325175 Phase adjust using relative error  
A system may adjust the times at which data is sampled by separate sampling mechanisms. Here, it may be desirable to ensure that one sampler samples data at substantially the same time as the...
7310397 Data recovery circuit, phase detection circuit and method for detecting and correcting phase conditions  
In the data recovery circuit of the invention, a first group of sampling clock pulses is used for sampling approximately the central portions of the data bits in an incoming data stream to produce...
7227919 Data sampler for digital frequency/phase determination  
A digital circuit and method for forming number streams for frequency and/or phase comparison of digital or digitized signals, referred to herein as clock signals, where typically one of the clock...
7119582 Phase detection in a sync pulse generator  
A phase detector and phase detection method for a sync pulse generator operable in a clock synchronizer that effectuates data transfer between first circuitry disposed in a first clock domain and...
7034723 Timing comparator, data sampling apparatus, and testing apparatus  
A data sampling apparatus includes plural stages of first variable delay elements for sequentially delaying a data signal by a first delay amount, plural stages of second variable delay elements...
7027545 Data sampler for digital frequency/phase determination  
The present invention, generally speaking, provides a digital circuit and method for forming number streams for frequency and/or phase comparison of digital or digitized signals, referred to...
6952138 Generation of a phase locked loop output signal having reduced spurious spectral components  
The present invention helps to mitigate and reduce the amount of interfering signals (e.g. RF leakage) that enter the phase detector of a phase locked loop by acting as a less than perfect...
6950956 Integrated circuit with timing adjustment mechanism and method  
An integrated circuit device includes a receiver, a register and a clock circuit. The receiver samples data from an external signal line in response to an internal clock signal. The register...
6806741 Phase comparator capable of performing stable phase comparison for high frequency band  
A phase comparator includes a phase comparison unit performing a phase comparison. The phase comparison unit carries out a switching operation according to the exclusive OR between two signals to...
6806742 Phase detector for low power applications  
A low-power phase detector with differential output may comprise a control signal generator. In one embodiment, two cyclic waveforms whose phase relationship is to be measured may be input to a...
6753704 Sampling phase detector  
The invention proposes a sampling phase detector in which a first sampling transistor with a very high sensitivity determines the phase of a signal to be sampled. A signal representative of the...
6674309 Differential time sampling circuit  
A method and apparatus for measuring and controlling the phase difference or time difference between two signals is presented. In some embodiments two sample and hold (S/H) circuits are arranged...
6671755 System for data capture from a rotor  
A data capture system (1) has modular amplifier circuits (10) connected to modular capture circuits (11) within a rotor 2. Each capture circuit (11) has an FPGA (26) operation according to...
6614314 Non-linear phase detector  
A non-linear phase detector includes a retiming stage and a phase synchronization stage. The retiming stage is coupled to a data signal and a recovered clock signal. The retiming stage is...
6538475 Phase detector  
A phase detector and corresponding method. The phase detector detects a transition of a first signal and generates an output signal having a first value if a transition of a second signal occurs...
6525521 Sample and hold phase detector having low spurious performance and method  
A method for lowering the spurious output of a sample and hold phase detector includes the steps of charging a ramp node (502) to a first voltage level after a sample period (606) has occurred....
6509802 PLL-tuning system having a phase detector with a sampling frequency equal to a reference frequency  
A time discrete PLL-tuning system includes a phase detector and a voltage-controlled oscillator (VCO) for tuning the frequency (fVCO) thereof to a frequency equal to N/M times a reference...
6420918 Phase control for oscillators  
A phase locked loop, comprising: a controllable oscillator requiring a control signal having a given bias voltage for generating a clock signal; an integrator for developing the control signal; a...
6333679 Phase locked loop arrangement in which VCO frequency is a fraction of reference frequency  
In a phase locked loop arrangement of a frequency synthesiser, a signal outputted from a voltage controlled oscillator is locked to a reference oscillator. A phase detector is arranged so that the...
6317006 Frequency synthesizer utilizing phase shifted control signals  
A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage...
6263032 Phase detector estimator  
A phase detector for a timing control loop provided in a signal sampling system to control taking samples by a sampler of input signals provided to a signal sampling system to result in a signal...
6150891 PLL synthesizer having phase shifted control signals  
The synthesis of high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator...
6107890 Digital phase comparator and frequency synthesizer  
The phase of a pulsed test signal is measured with reference to a reference signal of constant frequency by sampling the test signal at times determined by transitions in the reference signal and...
6094101 Direct digital frequency synthesis enabling spur elimination  
The present invention, generally speaking, provides improved methods of generating clean, precisely-modulated waveforms, at least partly using digital techniques. In accordance with one aspect of...
6072344 Phase-locked loop (PLL) circuit containing a phase detector for achieving byte alignment  
A parallel sampling receiver is disclosed that utilizes a sampled binary phase detector (SBPD) to achieve byte alignment. A parallel sampling receiver utilizes five parallel sampled phase...
6072336 Sampling circuit system  
A sampling circuit system enhances sampling resolution without increasing frequencies of clock signals for sampling. An input waveform is input to a first group of sampling circuits and a sampling...
6069849 Method and system for measuring signal propagation delays using the duty cycle of a ring oscillator  
A circuit measures the signal propagation delay through a selected test circuit. The test circuit is provided with a feedback path so that the test circuit and feedback path together form a...
6049297 Digital phase measuring system and method  
A digital phase measuring system and method for measuring the phase difference between two signals including generating quadrature clock signals for a first reference signal, converting a second...

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