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8138801 Frequency crossing detection using opposing pattern detectors  
A system and method are provided for matching a signal (compClk) to a particular frequency band in a multiband communications device. The method accepts a compClk signal, a frequency source is...
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...
7956649 Frequency pattern detector  
A window sampling system and method are provided for comparing a signal with an unknown frequency to a reference clock. A pattern modulator accepts a compClk signal and supplies a test window with...
7952344 Frequency characteristic measuring apparatus  
A frequency characteristic measuring apparatus measures a device under test in which the frequency of an input signal and the frequency of an output signal differ from each other, simplifying the...
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...
7802125 Over clocking detecting and permitting access to stored over clocking indicator in a power down state  
A method and an apparatus to detect over clocking of a processor are illustrated. The over clocking detector may detect as to whether the system clock of a microprocessor is over clocked and then...
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...
7750683 Phase/frequency detector  
PFD includes UP and DOWN signal modules, and RESET signal module. UP and DOWN signal modules transmit UP and DOWN signals according to reference and fed-back clock signals. RESET module includes...
7274185 Methods of generating internal clock signals from external clock signals and of measuring the frequency of external clock signals and related frequency measuring circuits and semiconductor memory devices  
Pursuant to certain embodiments of the present invention, methods of generating an internal clock signal in a semiconductor memory device are provided in which the frequency of an external clock...
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...
7148755 System and method to adjust voltage  
A system and method that can be utilized to implement voltage adjustment (e.g., for an integrated circuit). In one embodiment, the system comprises a frequency generator that provides a clock...
7109756 Synchronization of programmable multiplexers and demultiplexers  
Systems and methods are disclosed to provide clock and data synchronization for input/output interfaces of a programmable logic device. In accordance with one embodiment, a phase-locked loop or a...
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...
6831485 Phase frequency detector with a narrow control pulse  
A phase frequency detector with a narrow control pulse comprises mainly two substantially equivalent phase latches with a narrow control pulse, and a reset signal generating unit. Each phase latch...
6680631 Setting the speed of clocked circuitry  
A way is disclosed of establishing at system reset of both physical operating speed limitations imposed on a secondary bus by a circuit layout as well as the speed capabilities of agents attached...
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...
6636079 Phase comparing circuit, PLL circuit, televisions broadcasting receiver, and method of comparing phase  
An object of the present invention is to provide a phase comparing circuit capable of outputting a signal in accordance with phase difference with a high degree of accuracy, even if the phase...
6593785 Method and circuit for reducing power and/or current consumption  
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to receive a device input signal. The apparatus may be configured to perform a predefined function...
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,...
6392495 Frequency detector circuits and systems  
A frequency detector embodying the invention includes circuitry for comparing first (e.g., a reference) and second (e.g., a recovery clock) signals having first and second frequencies,...
6362693 Frequency detection method for adjusting a clock signal frequency and a frequency detector circuit for carrying out the method  
In a frequency detection method for adjusting a clock signal frequency to the data rate of a received data signal, the clock signal which is predivided by a factor of 4. The predivided clock signal...
6313669 Buffer circuitry  
There is provided buffer circuitry that can include a data output circuit for connecting a first power supply to its output terminal when a data applied thereto is at a HIGH level, or connecting a...
6137287 Physical parameter sensor having a self-testing circuit which recognizes an abnormal sensor state  
A sensor for detecting a physical parameter is capable of detecting an error state in which normal physical parameter detection is not possible even though the output voltage is within a normal...
6081143 Frequency comparison and generation in an integrated processor  
An integrated processor includes a microprocessor core and a bus interface unit. The integrated processor receives a reference clock signal and an external clock signal. The frequency of the...
6081137 Frequency detecting circuit  
A frequency detecting circuit is provided that includes a level shift detecting unit for generating pulse signals of a certain pulse width at each level shifting of input clock signals and a level...
6020765 Frequency difference detector for use with an NRZ signal  
A frequency difference detector includes a pulse generator that receives an NRZ signal and a reference signal and provides data pulses having first edges based on edges of the NRZ signal and second...
5959487 Integrated circuit with speed detector  
A circuit is designed with a reference circuit (200) for generating a reference signal. The reference signal determines a reference period. A delay circuit (208, 212, 216) responsive to the...
5929670 Method for improving signal generator frequency precision using counters  
A method for improving the precision of a signal generator utilizing counters. The difference between an external standard signal frequency and an internal standard frequency is measured by digital...
5796272 Frequency deviation detection circuit  
A frequency departure detecting circuit permits flexibly modify a detecting condition of frequency departure. A working reference clock is counted for a given period. On the basis of uniformity...
5736873 Power saving control circuit for a display apparatus  
A power control circuit of a monitor capable of being applied to all kinds of monitors is constructed to supply a control signal in accordance with the state of the monitor among On, Stand-by,...
5652532 Frequency difference detection apparatus  
A frequency difference detection apparatus includes a first PLL, a second PLL, a first phase difference detection unit, a second phase difference detection unit, a phase difference processing unit,...
5650743 Common mode controlled signal multiplier  
A common mode controlled signal multiplier includes a pair of interconnected differential amplifiers, each of which receives a common mode signal and an input signal and generates one phase of a...
5619155 IC-chip operation inhibitor  
An IC chip operation inhibitor to prevent operation of an IC chip in a system having a clock rate that exceeds a predetermined reference clock rate for the chip. The inhibitor has a frequency...
5592129 High resolution, large multiplication factor digitally-controlled frequency multiplier  
A frequency multiplier circuit generates an supplemental high-frequency timing signal from a single, low-frequency current-controlled oscillator (CCO). The current-controlled oscillator (CCO)...
5592111 Clock speed limiter for an integrated circuit  
A speed governor for an integrated circuit which prevents the operation of the integrated circuit above a selected frequency. The speed governor generates a frequency reference and compares the...
5563928 Method and apparatus for optimizing the performance of digital systems  
A free running relaxation oscillator is disposed on a semiconductor integrated circuit die for generating a frequency representative of the natural frequency of the die. The natural frequency of...
5497110 Frequency monitor and error detector circuit  
A frequency monitor and error detector circuit that processes an input ac signal to be monitored, comparing the input ac signal with an internally generated reference center frequency, and...
5477196 Pulse generator  
In a device for encoding a pulse phase difference or controlling an oscillation frequency based on delayed signals sequentially output by a delay circuit, the encoding of a pulse phase difference...
5469087 Control system using harmonic filters  
A harmonic filter for active or adaptive noise attenuation control systems for obtaining the complex amplitude of a single harmonic component from a signal which contains one or more harmonic...
5446771 Adaptive coherent signal detection method and apparatus  
A detector (100) determines whether an input signal (10) comprises a first signal or a second signal. A first local signal (207) is generated based on the first signal and a second local signal...
5438599 Self-calibration timing circuit  
A method and apparatus for a "self-calibration timing circuit" is utilized to dynamically compensate for inherent performance differences between individual semiconductor dice, and for a wide range...
5357147 Wave-shaping apparatus  
An input signal processing apparatus for use in a comparator which compares an input signal with a reference voltage signal to output a signal inverted in accordance with a comparison result. The...
5329188 Clock pulse measuring and deskewing system and process  
The skew of a circuit within a clock pulse distributing network is determined by establishing a closed loop circuit including the circuit under test. A sampling period is established such as by a...
5325049 Frequency deviation measuring apparatus  
Based on a desired center frequency and a frequency resolution for a signal to be measured which are entered via an operator section, a micro-CPU calculates the frequency dividing number, a preset...
5247215 Frequency range detector  
A phase lock loop operates independent of temperature and process variation by digitally loading a VCO until reaching the desired operating frequency. The VCO reaches a high output frequency even...
5241567 Circuit for demodulating PSK modulation signals  
In a differential-detection demodulator circuit, a PSK modulated signal is compared with a locally oscillated signal to obtain a phase difference between the two signals, whereupon the phase...
5206549 Frequency discriminating circuit  
A frequency discriminating circuit suitable for use with a display capable of displaying image data of a plurality of signal formats and which has an oscillator for generating an oscillation...
5189379 Pulse width detecting circuit and PLL synthesizer circuit using the same  
A PLL synthesizer circuit includes a reference frequency generator for generating a reference frequency signal and a reference clock signal, a phase comparator for comparing a phase of the...
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