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8169236 Frequency detection mechanism for a clock generation circuit  
A frequency detection mechanism for a clock generation unit on an integrated circuit includes a clock generation unit and a detection unit. The clock generation unit may generate an output clock...
8159306 Integrated circuit with low temperature coefficient and associated calibration method  
An integrated circuit (IC) with a low temperature coefficient and an associated calibration method are provided to lower the effect of the environmental temperature on the IC and at the same time...
8125250 Frequency detection mechanism for a clock generation circuit  
A frequency detection mechanism for a clock generation unit on an integrated circuit includes a clock generation unit and a detection unit. The clock generation unit may generate an output clock...
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...
8076979 Lock detection circuit for phase locked loop  
A lock detector circuit for detecting a lock condition between a reference signal and a feedback signal includes a first counter for outputting a first counter value indicative of a number of clock...
8040158 Frequency difference detection apparatus and method, frequency discrimination apparatus and method, and frequency synthesis apparatus and method  
An apparatus having a complex sine wave generating circuit (3) that generates a complex sine wave, a multiplying circuit (4) that multiplies an input signal by the complex sine wave, a first...
7936348 Methods and apparatuses using control indicators for data processing systems  
A control indication assembly. A first control mounted on a surface of a computer is coupled to a first sensor, to a first sensing circuit to send an electrical signal to the first control when a...
7882473 Sequential equivalence checking for asynchronous verification  
Mechanisms for performing sequential equivalence checking for asynchronous verification are provided. A first model of the integrated circuit design is provided that has additional logic in it to...
7873130 Frequency comparator utilizing enveloping-event detection via symbolic dynamics of fixed or modulated waveforms  
Systems, algorithms, circuits, and methods for pattern detection of signature events in signal dynamics defined by instantaneous states of applied square-wave signals. Selected patterns may be...
7852122 Transmission circuit for transmitting a differential signal having pulse time larger than a predetermined minimum pulse time and CMOS semiconductor device  
A transmission circuit, which transmits a differential signal having pulse time larger than a predetermined minimum pulse time, includes: a driving unit for feeding the differential signal as a...
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 use,...
7785284 Joint for fluid transport lines for medical use  
The joint (36) comprises a tubular body (37) having two connecting zones (38, 39) each connected by an end to a tubular element (40) of a fluid transport line, giving continuity to passage of...
7786763 Clock circuit with harmonic frequency detector  
A clock circuit includes a phase-lock loop for generating an output clock signal based on a data signal and a harmonic frequency detector for detecting whether the frequency of the output clock...
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...
7754504 Light-emitting diode, method for making light-emitting diode, integrated light-emitting diode and method for making integrated light-emitting diode, method for growing a nitride-based III-V group compound semiconductor, light source cell unit, light-emitting diode  
A method for making a light-emitting diode, which including the steps of: providing a substrate having at least one recessed portion on one main surface and growing a first nitride-based III-V...
7696789 High-frequency signal detector  
Disclosed is a high-frequency signal detector circuit including a diode detector circuit for detecting an input signal by diode detection; a differential-input/differential output amplifier with a...
7613254 Phase detector for comparing phases of data and a plurality of clocks  
A phase detector that compares the phases of data and four-phase first to fourth clocks having a half rate of the data and being 90° out of phase with one another. Exemplary embodiments of the ...
7532040 Programmable sensitivity frequency coincidence detection circuit and method  
A frequency coincidence detection circuit for detecting frequency edges for each of a plurality of periodic digital signals. The circuit generates count indicators for each of the periodic digital...
7511537 Comparator circuit for reducing current consumption by suppressing glitches during a transitional period  
A comparator circuit for reducing current consumption in a low consumption mode while suppressing the generation of glitches during a transitional period. The comparator circuit includes a...
7456661 Phase-locked/frequency-locked loop and phase/frequency comparator therefor  
A phase/frequency comparator is described which includes two edge-triggered storage elements, each set by an edge of a reference frequency signal of a phase—or frequency-locked loop (PLL) and by a...
7454645 Circuit and method for monitoring the status of a clock signal  
A circuit and method are provided herein for monitoring the status of a clock signal. In general, the method may include supplying a pair of clock signals to a clock monitor circuit, which is...
7453289 Transmission circuit, CMOS semiconductor device, and design method thereof  
A transmission circuit, which transmits a differential signal having pulse time larger than a predetermined minimum pulse time, includes: a driving unit for feeding the differential signal as a...
7449962 Phase-controlled current source for phase-locked loop  
A phase-controlled current source for phase-locked loop is provided. The phase-locked loop includes a voltage-controlled oscillator to associate a charging path or discharging path in order to...
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 use,...
7388408 Phase-frequency detector capable of reducing dead zone  
A phase-frequency detector generates output signals at a first and a second output end based on input signals received at a first and a second input end. The phase-frequency detector includes two...
7375557 Phase-locked loop and method thereof and a phase-frequency detector and method thereof  
The phase-frequency detector may include a first flip-flop configured to generate a first signal, the first signal transitioning to a first logic level in response to a first edge of a first input...
7370247 Dynamic offset compensation based on false transitions  
A method and apparatus provide a receiver with an architecture to regulate a bit error rate of the receiver using an offset based on detecting false transitions in received data. In an embodiment,...
7242223 Clock frequency monitor  
A frequency monitor circuit (FMC) that is part of an integrated circuit chip for monitoring the frequency of one or more clocks present on the chip is disclosed. The FMC includes a reference window...
7231009 Data synchronization across an asynchronous boundary using, for example, multi-phase clocks  
Additional information on the phase of an external clock signal is obtained by using clock signals to determine if a phase difference between an external clock signal and a first internal sampling...
7136771 Semiconductor device and testing circuit which can carries out a verifying test effectively for non-volatile memory cells  
A testing circuit includes m block test units and a first logical processing unit. The block test unit compares a first data outputted from a test object with a reference data, and outputs a result...
7112959 Comparator circuit and rotation detector  
The comparator circuit includes an amplifier amplifying a voltage signal inputted from outside, a voltage dividing circuit dividing down a power supply voltage supplied from outside, thereby...
7095254 Method for producing a control signal which indicates a frequency error  
A method which provides a very simple way of forming a control signal if the frequencies differ too greatly from one another between a useful signal and a reference signal. A control signal is...
7061277 Low power differential-to-single-ended converter with good duty cycle performance  
A differential-to-single-ended (DSE) converter receives a positive differential input and a negative differential input and generates a single-ended output. The DSE converter comprises: 1) a first...
7057419 Phase synchronization circuit  
In a phase sync circuit (40) which extracts a clock signal CK from a data signal D in a random NRZ format, particularly in a phase sync circuit (40) of a dual loop configuration including both a...
7038497 Differential current mode phase/frequency detector circuit  
A fully differential phase and frequency detector utilizes a multi-function differential logic gate to implement a differential AND gate operation and provides a fully differential D-flip-flop. The...
6982592 Zero if complex quadrature frequency discriminator and FM demodulator  
A frequency discriminators (FD) and frequency modulation (FM) demodulators, utilizing single sideband (SSB) complex conversion directly to zero IF, suitable for direct demodulation at high...
6949958 Phase comparator capable of tolerating a non-50% duty-cycle clocks  
A method and circuit for achieving minimum latency data transfer between two mesochronous (same frequency, different phase) clock domains is disclosed. This circuit supports arbitrary phase...
6842049 Method of and apparatus for detecting difference between the frequencies, and phase locked loop circuit  
An apparatus for detecting a difference between frequencies includes a beat waveform generator which generates a beat waveform signal having a frequency which is equal to a difference between...
6665367 Embedded frequency counter with flexible configuration  
An integrated circuit according to the present invention includes application-specific circuitry and an embedded counter assembly capable of measuring the frequency of one or more clock signals,...
6642747 Frequency detector for a phase locked loop system  
A frequency detector circuit is arranged to detect a frequency difference between a clock signal and a reference clock signal. The frequency detector circuit includes four flip-flop circuits and a...
6580297 Frequency comparison circuit  
The objective of the invention is to provide technology to give high-speed DVD RF signal reading. Frequency comparison circuit 1 of the present invention has edge spacing detection circuit 3,...
6563346 Phase independent frequency comparator  
A method and circuit for comparing the frequencies of two clocks (clock—1 and clock—2), without taking into account their phase, is disclosed. Each clock is associated to a circular counter (10...
6407642 Frequency detector and phase-locked loop circuit including the detector  
A three-state phase detector, including two latches and one NAND gate, is provided with two additional latches. To detect a phase difference between first and second input clock signals R and V,...
6359948 Phase-locked loop circuit with reduced jitter  
An improved phase-locked loop circuit includes a variable-frequency oscillator that generates a first oscillator signal, a reference signal source that generates a second oscillator signal, a...
6333646 Abnormal clock detector and abnormal clock detecting apparatus  
Frequencies of clocks CLK1 and CLK2 are divided in frequency divider circuits (11 to 14), frequency-divided clocks CLK1A and CLK1B are input into clock comparators (15) and (16). Frequency-divided...
6326826 Wide frequency-range delay-locked loop circuit  
A delay-locked loop (DLL), including frequency detection logic and a phase detector, is described having an operating range as wide as a conventional charge pump phase locked loop. The frequency...
6269136 Digital differential analyzer data synchronizer  
A digital differential analyzer data synchronizer receives data at a first clock rate and synchronizes the data to a second clock rate. The two clock rates are related by a ratio of two integers,...
6194918 Phase and frequency detector with high resolution  
A phase detector for measuring phase differences between K input signals is provided. The phase detector includes a counter, K first registers and a first subtractor. Each first register receives...
5689207 Front-end circuit  
A front-end circuit which receives a first input signal and a second input signal, and outputs an output signal having a differential frequency between the first input signal and the second input...
5600272 Digital damping method and apparatus for phase-locked loops  
A damping circuit is described which includes a phase-and-frequency detector, a charge pump, a voltage-current oscillator and a capacitor. The phase-and-frequency detector generates UP and DOWN...
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