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Patent Searching and Data


Matches 451 - 500 out of 2,128

Document Document Title
JP3307723B2
PURPOSE: To enable highly accurate detection of a phase difference between an optical signal and an electrical signal by computing a product of a voltage signal and the optical signal with a photoconductive type photodetector directly to...  
JP2002125249A
To provide a signal inspection device that can inspect a level change point of an input signal at high speed.A level discrimination section 11 discriminates a logical level of a pulse signal S-OUT at a phase designated by a signal S12. A...  
JP3297759B2
PURPOSE: To provide a method for evaluating phase comparators by which a phase comparator can be evaluated by extremely easily deciding the output state of the phase comparator in a DC sense without making any special circuit change. CON...  
JP2002511941A
(57) Circuit (10) which judges the cycle and phase relations between summary waveform signals (28 and 30). A delay line (12) contains further a latch element (34) and a series of delay elements (32) relevant to an encoder (36) inside, in...  
JP2002112579A
To detect the phase of a rotor in a synchronous motor or the like with high accuracy and at minimum calculation load.The phase of the rotor is computed, based on the latest phase detection position and time value date, from the time meas...  
JP2002111459A
To provide a phase comparison circuit with a small number of components.Input signals Vin1 and Vin2 are input to a first and second input terminals 11 and 12, respectively. When Vin2=V1, an output terminal 13 is turned into a low level V...  
JP2002112580A
To perform phase detection with high accuracy by avoiding dispersion in detecting phase signals and degradation in accuracy caused by acceleration of a rotating body.This phase detector for rotating body comprises a phase signal generati...  
JP3296350B2
To obtain a phase detection circuit whose operating margin is sufficiently ensured. A data signal D1 to be checked and a clock signal C1 are given to an F/F1 of a D-F/F circuit, a signal C1' resulting from delaying the signal C1 by a del...  
JP2002107394A
To provide a device which is capable of exactly detecting jitters for detecting jitter quantities from signals at two sampling points around an edge which are subjected to analog/digital conversion, and to provide a phase synchronizing l...  
JP2002107390A
To provide a device capable of comparing phases of signals by using only one digitizer.By providing a signal output part 10 for selecting a first input signal and a second input signal of the same frequency one by one and outputting them...  
JP2002107393A
To provide a measuring instrument for measuring time differences (time intervals) between two signals in a DVD and the like, in which a time measuring circuit is simplified.A time interval measuring instrument is constituted at least of ...  
JP2002509415A
(57) using the phase sensitive detector (21, 22) of the summary 2 - with the self-compensation phase sensitive detector which prepared one and the control good displacement phase shifter (20) of them in the negative feedback loop (23), A...  
JP2002506975A
(57) The method of showing summary information and the digital oscilloscope which primary measurement of a signal is performed and is displayed are indicated. A parameter is acquired from the signal based on primary measurement data agai...  
JP3282195B2
PURPOSE: To detect phase difference between a first AC normal power supply and a second AC emergency power supply, both of them constituting an AC power supply unit. CONSTITUTION: Zero-cross detecting circuits 3, 4 detect zero-cross of v...  
JP2002506519A
(57) Dual port stock type VNA make possible both of reflection performed in a summary 25MHz*3.3GHz range, and transmitting measurement. The above-mentioned stock type VNA is equipped with the pursuit synthesizer (420) which generates LO ...  
JP2002054950A
To provide an abnormality detection device for a three-phase type phase signal generator hardly receiving an adverse effect of intruding noise on a measurement system and capable of surely detecting the abnormality such as disconnection ...  
JP2002052768A
To determine a digital phase shift in signals.A driving signal 13 inputted to an ultrasonic transmitter 14 is sampled as a reference signal. When a fall edge to a low level is detected, a counter is initialized. The driving signal 13 is ...  
JP2002039654A
To enable a user to easily recognize a situation wherein a phase lock is about to be released.A display means 46 comprises a liquid crystal display screen 40 and a back light 44. A PLL oscillation circuit 20 generates an internal clock s...  
JP3274068B2
To perform phase decision with high reliability by setting a detection timing with reference to the rising or falling edge of one zero-cross(ZC) data. ZC data S1, S2 obtained from two waveforms for determining the phase are inputted to t...  
JP2002009595A
To provide a device for setting a TDEV(time deviation) mask that can easily revise setting of a TDEV mask characteristic.The TDEV mask characteristic setting device 12 for a wander generator to set a TDEV mask characteristic is provided ...  
JP3264612B2
To continue operation when the power supply of, for example, a thyristor (including GTO) phase control power converter incorporating a phase detection device fails (for example, grounding, phase interruption, and three- phase unbalance) ...  
JP2001349911A
To provide a technology of measuring the phase difference between synchronous signals with high accuracy.This system has an integrated circuit device for comparing the relative phases of first and second signals with each other with very...  
JP2001525632A
(57) In order to measure the relative time between summary phenomena (for example, between an input zero cross and sample pulses), the phase digitizer with error compensation using the record from the phase reference by digital generatio...  
JP3257376B2
To overcome a problem by erroneous wiring of cables by outputting a phase difference compensating value with any one phase of the angle data and input phase voltage of the phase sequence detecting means. An angle data generating means 41...  
JP2001525142A
(57) Summary book invention is used for a phase lock circuit, and relates to the phase detector equipment for recovering a clock and a data pulse from the data flow which consists of the return-to-zero RZ signal which is digital data. Th...  
JP3252641B2
PURPOSE: To obtain a phase-difference measuring apparatus by which the phase difference (the very small time difference) between two signals at an identical frequency can be measured with high accuracy by reducing the required number of ...  
JP3252694B2
To make it possible to measure the phase difference (minute time difference) of two signals having the same frequency in high accuracy. In addition to two signals 101-a and 101-b having the same frequency obtained from flowmeters, the ou...  
JP2001311754A
To provide a time measuring device capable of outputting quantitatively comparable measured values and making an optimum phase adjustment based on the indicated value of an analog meter in the measurement of the plural time differences b...  
JP2001289918A
To shorten the required time for test, and to reduce the testing cost by further easily testing a PLL semiconductor device including a voltage control oscillator and a frequency divider. Not only the voltage control oscillator 10A but al...  
JP2001284965A
To perform the exact edge arrangement of high resolution without requiring a system clock of a frequency extremely higher than the frequency of a synthetic clock signal. This device is composed of a system clock signal source for a syste...  
JP2001272426A
To increase the reliability of a monitoring operation and a control operation by discriminating an abnormality. A first high-frequency generation means 1 and a second high-frequency generation means 2 by which a first high-frequency sign...  
JP2001264370A
To provide a frequency measuring apparatus in which a frequency can be measured in real time by a digital processing operation.A signal conversion part 21 comprises an A/D converter and an orthogonal demodulator, it converts a signal S t...  
JP3232560B2
To compensate a current error between a reference current and an output current and to operate this circuit even with a low voltage by providing a 3rd transistor and a constant current source between the collector of a 1st transistor and...  
JP2001242203A
To execute higher harmonic measurement by injecting dispersedly an in-phase current synchronized by a non-integer-fold frequency of a system fundamental frequency from each low rank system to the high rank system side, regardless of the ...  
JP2001242202A
To inject dispersedly an in-phase current or a voltage synchronized by a non-integer-fold frequency of a system fundamental frequency to the measuring side, namely, to the high rank system side from injection devices of each low rank sys...  
JP2001244792A
To attain high-speed filtering processing, using a low-speed device.A 1st arithmetic section 31 applying an arithmetic operation expressed in a transfer function 1/(1-α02z-2) to a received data stream x[n] which consists of two sets of ...  
JP3228414B2
To provide a phase comparator which makes it difficult to generate a dead zone in error detection characteristics, even if an error detection range varies relatively. Error signals UPB and DWB are varied in level with a reference signal ...  
JP2001215248A
To provide a phase detecting system for a power transmission/ distribution line capable of detecting phases being the same at two arbitrary points on the line.A power reception/distribution system is equipped with daughter stations 1a, 1...  
JP2001510566A
(57) So that an incoming-data series may be sampled on the frequency which is not equal to the multiple of the integer of the data transfer rate of a summary incoming-data series, and a divisor. A sampling means to operate under control ...  
JP3190363B2  
JP3189149B2  
JP3187081B2  
JP2001183411A
To provide a partial discharge measuring system, a partial discharge measuring device, a voltage phase measuring device, and a partial discharge measuring method, which do not need to transmit real-time voltage phase information. This pa...  
JP3203909B2
PURPOSE: To provide the A/D converter correcting a digitized error caused by fluctuation of an operation condition by itself and the physical quantity detector provided with the A/D converter. CONSTITUTION: A physical quantity detector d...  
JP2001165968A
To measure the frequency difference between two input signals to a phase detector, even when the frequency difference is higher than the frequency of a wander component to be measured.An input signal and a reference signal are frequency-...  
JP3174570B2  
JP3197955B2
PURPOSE: To provide a phase digitizer which has got rid of demerit inherent in a conventional phase digitiser, by using a trigger circuit. CONSTITUTION: A phase digitizer 20 to convert phase information of analog signal into digital indi...  
JP2001156755A
To obtain a phase detection circuit whose operating margin is sufficiently ensured.A data signal D1 to be checked and a clock signal C1 are given to an F/F1 of a D-F/F circuit, a signal C1' resulting from delaying the signal C1 by a dela...  
JP2001133492A
To simplify a digital filter being incorporated into a jitter-measuring instrument. A digital filter being incorporated into a jitter-measuring instrument is composed of a first adder 31 for subtracting a feedback signal that is located ...  
JP2001127623A
To solve a problem such that an operator can hardly observe a change in an output potential level by an analog output circuit in the case of measuring an output jitter quantity in various phase synchronization circuit inside an LSI. The ...  

Matches 451 - 500 out of 2,128