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Match Document Document Title
8903747 Isolating changes in dynamic systems  
A software optimization system isolates an effect of a change in a control variable from effects of ongoing, unknown changes in other variables. The system discards effects due to noise so that...
8878613 Time-to-digital converter (TDC) with improved resolution  
A time-to-digital converter (TDC) with fine resolution of less than one inverter delay is described. In an exemplary design, the TDC includes first and second delay paths, a delay unit, and a...
8351558 Multiphase direct RF frequency to digital converter and related method  
The disclosure provides an effective means for fine-resolution determination of the frequency content of an RF signal using low speed digital circuits. The disclosure relates to a method and...
8334716 Digital phase detection circuit and method  
A digital phase detector circuit and corresponding monitor and control logic is presented. The digital phase detector has two storage elements, where the data input of the first storage element...
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...
8289087 Method for detecting and correcting phase shift between I data clock in Q data clock in quadrature modulator or quadrature demodulator  
A computer-implemented method, device, and program product for detecting a phase shift between an I data clock and a Q data clock in processing an I data signal or a Q data signal used in...
8098085 Time-to-digital converter (TDC) with improved resolution  
A time-to-digital converter (TDC) with fine resolution of less than one inverter delay is described. In an exemplary design, the TDC includes first and second delay paths, a delay unit, and a...
8024686 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...
7847641 Digital phase and frequency detector  
Disclosed are a digital phase-frequency detector and a method of operating a digital phase-frequency detector. The detector includes an input circuit, an output circuit and a reset circuit. In...
7812644 Digital frequency detector and digital phase locked loop using the digital frequency detector  
A digital frequency detector and a digital phase locked loop (PLL) are provided. The digital frequency detector includes a first conversion unit which outputs a first frequency as first frequency...
7769121 Phase detector for data communications  
In one embodiment, a phase error signal generated by a phase detector is equalized to compensate for the distortion in the phase error signal due to finite circuit speeds. The equalization may be...
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...
7519925 Integrated circuit with dynamically controlled voltage supply  
An electronic system (10). The system comprises circuitry (P1) for receiving a system voltage from a voltage supply. The system also comprises circuitry (141), responsive to the system voltage,...
7443251 Digital phase and frequency detector  
Disclosed are a digital phase-frequency detector and a method of operating a digital phase-frequency detector. The detector includes an input circuit, an output circuit and a reset circuit. In...
7375558 Method and apparatus for pre-clocking  
A method and apparatus for pre-clocking have been disclosed.
7249275 Clock generating device and method for executing overclocking operation  
A clock tuning device and method for executing overclocking operations on plural elements disposed on a motherboard. The clock tuning device includes a phase-locked loop for outputting a plurality...
7242256 Phase frequency detector with programmable delay  
Methods and systems for locking a phase locked loop (PLL) are disclosed herein. A first impulse signal may be generated utilizing an input reference signal. A second impulse signal may be...
7084670 Phase-frequency detector with gated reference clock input  
A gated phase-frequency detector circuit includes a phase-frequency detector and a multiplexer circuit. The phase-frequency detector is arranged to provide UP and DOWN signals responsive to a...
6946887 Phase frequency detector with programmable minimum pulse width  
A structure and associated method for reducing a static phase error in a phase-locked loop circuit. The phase-locked loop circuit comprises a voltage controlled oscillator and a phase frequency...
6798303 Clock signal generating device  
A clock signal generating device is described, having an oscillator and a PLL connected downstream thereof. The clock signal generating device is distinguished by the fact that a phase shifting...
6469544 Device for detecting abnormality of clock signal  
A circuit for detecting abnormality of a subject clock signal, includes a frequency dividing circuit for frequency-dividing a monitoring clock signal to provide a frequency-divided monitoring...
6320424 Method of providing and circuit for providing phase lock loop frequency overshoot control  
A phase lock loop system is provided that includes a phase frequency detector device to receive a reference clock signal and a feedback clock signal and to provide a first control signal and a...
5952853 Method for extending the output range of pulse-width based phase detectors  
A circuit for generating a signal that is proportional to the phase difference between a reference signal and a variable frequency signal. The circuit includes a reference generating circuit for...
5920207 Asynchronous phase detector having a variable dead zone  
An asynchronous digital phase detector. The digital phase detector includes an asynchronous state machine which simulates an edge triggered J-K flip flop. Additionally, the digital phase detector...
5909129 Low cost microstrip phase detector  
A low-cost microstrip phase detector that is photo-etched onto a circuit board is disclosed. The phase detector is used to detect the phase difference between two high-power radio frequency (RF)...
5740210 Data discriminating circuit and a parallel data receiver using the same  
A data discriminating circuit is provided on the receiver side of a digital signal transmission system, and performs data discrimination with a proper phase relation settled between data and a...
5661419 Dynamic phase-frequency detector circuit  
A sequential phase-frequency detector circuit using precharged logic and a minimum number of transistors is suitable for use in a delay locked loop because of insensitivity to a stuck delay line...
5606276 Method and apparatus for creating a large delay in a pulse in a layout efficient manner  
A delay element (10) generates a delay pulse (OUT) the length of which is not dependent on an available system clock. The delay element uses oscillators (12a, 12b, 12c) and edge detectors (16a,...
5485108 Delayed detection type demodulator  
Within the differential detection demodulator, the received signal is first quantized by a limiter amplifier 10 and then subjected to frequency conversion by a frequency converter 50 including: an...
5451892 Clock control technique and system for a microprocessor including a thermal sensor  
A clock control circuit is provided to control the frequency of a microprocessor clock signal and includes a clock management unit which controls the frequency of a timing signal applied to a...
5309111 Apparatus for measuring skew timing errors  
Apparatus for measuring skew in a clock signal for processing a video signal includes a cascade connection of a plurality of analog delay elements to which the clock signal is applied. The output...
4884035 Wide range digital phase/frequency detector  
A digital phase/frequency detector circuit in a phase locked loop comprises a logic gate interconnected with a pair of bistable devices clocked respectively by input and reference digital signals...
4843332 Wide range digital phase/frequency detector  
A digital phase/frequency detector circuit in a phase locked loop comprises a logic gate interconnected with a pair of bistable devices clocked respectively by input and reference digital signals...
4490688 Digital and analog phase detector for a frequency synthesizer  
A sample and hold phase detector for a phase locked loop includes a digital detector for detecting the frequency and phase difference between the reference signal and the voltage controlled...
4451794 Phase comparator  
A phase comparator includes a first signal input terminal supplied with a reference signal, a second signal input terminal supplied with an input signal to be compared with the reference signal, a...
4341995 Velocity profile analyzer  
A velocity profile analyzing device measures the change or non-linearity in the velocity of a system under test, and digitally displays the measured variation. The principle of operation is to...
4151473 Phase detector circuit  
A phase detector which includes gated current generators for converting one of two signals which are to be phase compared into a periodic signal of generally triangular form. The other of the two...
4090126 Frequency marker generator  
A frequency marker generator for providing marker pulses corresponding to known frequencies over a wide band of frequencies is disclosed. A signal having a predetermined frequency or known...
4090143 Digital phase comparator with reset  
An all-channel PLL tuning system includes LOF counters, a comparator producing an equality pulse each time the LOF count matches a preselected channel number count and a digital phase-frequency...
3972000 Phase filter for reducing the effects of the noise components altering discrete phase modulated signals  
A digital phase filter including two decision filters connected in cascade or parallel for minimizing the noise components in a received phase modulated digital signal. The first decision filter...
3919653 Automatic frequency corrector for differential phase demodulator  
Correcting device ensuring automatically, at the receiving end, an exact timing of the frequency demodulated at the rated value, that timing being necessary for the demodulation to be effected...
3750035 FREQUENCY DISCRIMINATOR AND PHASE DETECTOR CIRCUIT  
Frequency discriminator and phase detector circuits are disclosed, each having two flip-flops, one flip-flop for each of two signals to be compared, and means for causing one flip-flop to be set...
3699461 ANALOG HARMONIC REJECTING PHASE DETECTOR  
An analog harmonic rejecting phase detector with even harmonic rejection achieved through a fundamental frequency, f r, phase detector section and rejection of the stronger odd harmonic signal...
3621352 INVERTER-CONTROL SYSTEM FOR AC MOTOR WITH PULSE-LOCKED CLOSED LOOP FREQUENCY MULTIPLIER  
The invention is a closed loop pulse-locked frequency multiplier. A master pulse train is applied to a digital discriminator, the output of which is in turn applied to a voltage controlled...
3604946 DUTY-CYCLE PHASE DETECTOR  
A phase detector circuit in which the rectifying elements conduct for a ftion of the reference period and therein determine the relative phase difference between an unknown input signal and a...
3569845 WIDE BAND FREQUENCY DISCRIMINATOR UTILIZING A CONSTANT AMPLITUDE EQUALIZER NETWORK  
A wide band frequency discriminator is disclosed wherein the signal whose frequency is to be detected is applied simultaneously to two parallel paths. One path leads directly into one input of a...
3524139 ELECTRONIC CIRCUIT FOR SIMULATING SERVO SYSTEM AND PHASE CONTROL THEREFOR  
3514698 DEVICE FOR GENERATING OR MEASURING PRESELECTED FREQUENCY SIGNALS  
3509370 PHASE DETECTOR SYSTEM  
3509454 APPARATUS FOR TUNING MUSICAL INSTRUMENTS  

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