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JP03206973 |
PURPOSE: To facilitate the measurement of a phase characteristic on an actual output side in a circuit to be tested by using an amplified waveform signal from the circuit to be tested as reference signal to detect a phase difference of a...
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JP03202785 |
PURPOSE: To easily measure the phase difference with a specific accuracy by a method wherein a alternating current voltage is changed to a square wave of a constant voltage, and then, the phase difference is taken out separately between ...
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JP03197875 |
PURPOSE: To stably measure a phase difference at all times by delaying one of two signals whose phase difference is to be measured according to the phase difference. CONSTITUTION: A zero-point detecting means 20 detects the moment when t...
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JP03194476 |
PURPOSE: To facilitate repetition measurements by making the change of stage return to the initial state by the detection performed in a setting device when the output state of J-K flip-flop which is a circuit to be measured is changed. ...
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JP03180770 |
PURPOSE: To prevent errors due to an input containing DC and high frequency components and due to a frequency fluctuation by sampling a synchronous input signal and measurement input signal during one cycle of the synchronous input signa...
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JP03162678 |
PURPOSE: To observe the number of waves and the number of pulses by finding a momentary phase from the result of the Hilbert transformation of an acquisition waveform and the signal before the transformation. CONSTITUTION: An analog inpu...
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JP03140884 |
PURPOSE: To measure a relative delay by one test by impressing first and second test signals synchronously on the respective ends of first and second transmission channels respectively and by forming a delay difference signal by combinin...
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JP03130668 |
PURPOSE: To generate two phase-difference signals having an intended accurate phase difference simply and quickly by dividing the signal of the frequency which is an arbitray multiple of the frequency of the intended phase-difference sig...
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JP03125514 |
PURPOSE: To detect a phase difference between 1st and 2nd pulse signals with high accuracy by using a gate delay circuit so as to generate plural pulse signals whose delay times are deviated slightly from each other and selecting a pulse...
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JP03120478 |
PURPOSE: To detect an accurate cycle and phase of a sinewave by leading out a position of actual maximum spectrum from positions and vectors of the maximum spectrum and its both-sides neighboring spectrums. CONSTITUTION: The heights of m...
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JP03113382 |
PURPOSE: To secure the operation of a device by deciding precedence or delay between two signals totally by using the wide range of a signal. CONSTITUTION: Two signals which are supplied to input terminals 1 and 2 are delayed by delay de...
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JP03111787 |
PURPOSE: To obtain high distance measuring accuracy by providing a second mixing circuit and a filter part, and forming a phase-difference detecting signal based on the output of a PLL circuit. CONSTITUTION: An optical beam from a light ...
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JP03096869 |
PURPOSE: To improve the data accuracy by measuring periodic data of an N period portion of a phase signal, and also, setting the number of times of measurement N of its period so as to be programmable, and executing the correction, based...
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JP03092775 |
PURPOSE: To achieve a higher accuracy by performing a measurement by a time counting clock signal with a time difference being not synchronous in frequency during a change in polarity to make an averaging with a lowpass filter having a s...
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JP03092774 |
PURPOSE: To achieve a higher accuracy by an A/D converter, a branching filter, a multiplier, a cumulative adder, a divider, an inverse tangential circuit and the like. CONSTITUTION: An analog input signal A is converted into a digital si...
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JP03085466 |
PURPOSE: To detect a phase in low cost by bringing a phase sensor into contact with a transmission line by an insulating rod and detecting a phase as an ON/ OFF signal. CONSTITUTION: When a voltage phase sensor 14 is supported by an insu...
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JP03082969 |
PURPOSE: To perform stable measurement with high accuracy by constituting two circuits respectively measuring the mutual phase difference between two reference pulses having predetermined phase difference and the phase difference between...
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JP03082970 |
PURPOSE: To perform accurate measurement with high accuracy even when a waveform to be measured has strain by generating respective reference waveforms almost the same as a pair of AC waveforms to be measured in frequency and delayed fro...
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JP03080620 |
PURPOSE: To speed up period difference detection and phase difference detection between two inputs with simple constitution by inputting the counted value of a counter, which is set in response to the input of each pulse of a 1st input p...
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JP03075573 |
PURPOSE: To measure an electric resistance by allowing a filament to be constructed of an internal conductor of a coaxial transmission line and measuring a propagation constant of the signal injected into the line. CONSTITUTION: A signal...
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JP03073866 |
PURPOSE: To form a highly accurate phase indicator circuit compensating the influence of a threshold drift or the like by utilizing the symmetricity of the waveform of an input signal to drive a multi-vibrator. CONSTITUTION: Two sine wav...
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JP03054481 |
PURPOSE: To return to normal detecting operation even when phase difference is about 180° by inputting the single phase signal inputted to a phase comparator and the single phase signal being the output of a two-phase AC generator of th...
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JP03040542 |
PURPOSE: To obtain an expected jitter suppressing effect without amplifying noise by detecting the phase jitter frequency of a receiving signal and extracting only a phase jitter component from a receiving signal to correct the phase. CO...
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JP03009268 |
PURPOSE: To measure a phase accurately and stably by measuring a pulse wave having the pulse width according to the phase difference between the converted square wave voltage of sine wave voltage impressed to a body to be inspected and t...
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JP02298872 |
PURPOSE: To measure a phase with high accuracy by operating the frequency of the input recorded on a shift register and detecting the phase of said input on the basis of sine and cosine local signals same in frequency and becoming 0 in a...
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JP02291974 |
PURPOSE: To obtain a phase detector of simple structure requiring only a single amplifier by connecting the output terminal of an integration amplifier in an integrator with the inverted input terminal of the integration amplifier throug...
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JP02278174 |
PURPOSE: To obtain a certainly operated detection apparatus by constituting said apparatus of the tachometer of a starting generator, the tachometer of a synchronous motor and an operator comparatively operating the signals from both tac...
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JP02272365 |
PURPOSE: To improve accuracy of an operating time by detecting rise and fall points of rectangular wave pulse signal upon receipt of the rectangular wave pulse signal and detecting phases of the signals inputted in accordance with the ti...
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JP02268276 |
PURPOSE: To achieve a phase control of a power converter stably by arranging a first phase lock loop circuit to detect a phase of an AC voltage and a second phase lock loop circuit to detect a phase of an AC signal outputted from the abo...
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JP02227672 |
PURPOSE: To make it possible to calculate the ideal phase orbit of a transmission signal by utilizing the phase of data lock, detected data sequence and necessary time interval. CONSTITUTION: An RF signal to modulated generated by a tran...
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JP02212775 |
PURPOSE: To improve accuracy in detecting synchronization of a phase of a basic wave and in detecting a phase and an amplitude of an alternating current voltage by switching a zero cross point phase detecting/operating unit and a Fourier...
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JP02201170 |
PURPOSE: To miniaturize a phase adjustor and, simultaneously, to reduce the number of switching contacts of a tap switching device by making either one side of the advance or lag of the phase adjusting width of the phase adjustor narrowe...
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JP02198368 |
PURPOSE: To reduce measuring errors of an insulation resistance by detecting the leaking current of a commercial frequency included in an output of a zero phase current transformer, multiplying said leaking current by a coefficient and r...
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JP02194366 |
PURPOSE: To correct with an easy method a phase compensation for current transformer varying with a leak current of commercial frequency by detecting the amount of the leak current of commercial frequency included in the output of a ZCT(...
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JP02173578 |
PURPOSE: To detect and control accurate phase angles of two sinewave AC quantity by measuring directly and using instantaneous values of both waveforms at an intersected point with the waveform at one side of switching contacts and the p...
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JP02168809 |
PURPOSE: To discriminate the phase without requiring root operation by judging whether the value obtained by subtracting the product of a value to be discriminated and the absolute value of sine operation value from the product of the va...
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JP02157667 |
PURPOSE: To reduce a secondary interference signal by taking out an in-phase carrier A and a quadrature carrier B from an input carrier and an in-phase carrier C and a quadrature carrier D from a reference carrier and supplying a signal ...
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JP02147866 |
PURPOSE: To obtain a circuit device that is directly operated by an arbitrary digital signal including information and is operated in phase comparison direction for measuring jitter modulation by constituting the device, for example, by ...
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JP02145978 |
PURPOSE: To use a polyphase alternating-current signal as an input signal as it is and thereby to make it possible to follow quickly a change in frequency of the input signal and a change in phase thereof, by making an interphase phase d...
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JP02136756 |
PURPOSE: To detect an output being proportional to only a modulation component by detecting a voltage and a current of power 3-phase AC by an optical fiber sensor, and controlling the light emission quantity so that a DC component of the...
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JP02107974 |
PURPOSE: To enable accurate determination of a phase difference by giving a count start instruction to a phase difference detecting circuit at a time point when conversion of two voltage inputs into rectangular waves is started and a pul...
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JP02096666 |
PURPOSE: To enable execution of accurate estimation by subtracting 2πi/T [(i) =...-1, 0, +1..., T is a cycle] so as to make a fresh estimated value of frequency be a value within a range of ±π/T and by updating thereby an estimated va...
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JP02096664 |
PURPOSE: To enable execution of optimum estimation in a short time by a method wherein a detected phase error is weighted with a function based on a time and is multiplied by first and second time variation coefficients. CONSTITUTION: A ...
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JP02096665 |
PURPOSE: To enable execution of optimum estimation by a method wherein a detected phase error is weighted with the amplitude of an input sine wave and multiplied by first and second time variation coefficients. CONSTITUTION: A sine wave ...
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JP02054612 |
PURPOSE: To attain high accuracy and to obtain an optional detection time position by dividing a time width of an input pulse by a divisor in response to the desired detection time position, subtracting the result of division from a pres...
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JP02049170 |
PURPOSE: To obtain an exact phase difference signal by deriving an average voltage of a voltage obtained by segmenting and synthesizing at every positive or negative section waveforms of a difference voltage of a reference AC voltage and...
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JP02026218 |
PURPOSE: To detect a short-circuit trouble zone without information transmitting means between iron towers by discriminating the direction of the short-circuit trouble point of both end power source system by a sensor mounted near a powe...
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JP02016461 |
PURPOSE: To enable phase detection between input signals which differ in frequency (n) times by providing a switch means which passes a 2nd input signal only when a 1st input signal passes and calculating the mean value of its output. CO...
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JP02013859 |
PURPOSE: To detect abnormality such as the voltage drop and phase variation of three-phase power supply voltage by comparing levels at every phases of three-phase power supply voltage to output the first - third pulses corresponding to r...
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JP02010922 |
PURPOSE: To attain complete circuit integration for a digital PLL circuit for an electronic apparatus or the like by providing an n-stage of delay elements, an n-stage of delay registers, an encoder and a correction circuit so as to dete...
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