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JP07154256 |
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...
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JP07131972 |
PURPOSE: To make it possible to obtain a synchronous phase signal by quickly following up to a sudden change in the voltage phase of an AC power supply by controlling the slope of a second triangular wave signal in such a manner that the...
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JP07120511 |
PURPOSE: To realize a digital phase indicator which can stably operate and correctly display even if waveforms include noise or difference in voltage and current amplitude exists. CONSTITUTION: The digital phase indicator comprises range...
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JP07110349 |
PURPOSE: To make it possible to measure a phase difference in the display range of 0 to 360° by executing computation on the basis of the phase difference determined by a digital signal processor (DSP) and a leading or lagging phase sig...
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JP07099450 |
PURPOSE: To provide a phase difference coding circuit by which a the number circulation is counted at one location. CONSTITUTION: A NAND g00 and inverters g01-g62 are connected in series and an output of the inverter g62 and a pulse PA a...
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JP07077544 |
PURPOSE: To lessen the electric power loss of a port by installing a power divider and a phase shift circuit and using a part of a plurality of detectors as matching detectors and the rest as unmatching detectors. CONSTITUTION: A signal ...
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JP07043404 |
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...
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JP07035793 |
PURPOSE: To obtain a compact and inexpensive phase detection circuit by reducing circuit scale in reading a phase difference of AC waveform into a microprocessor. CONSTITUTION: A phase detection circuit is provided with first and second ...
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JP07030429 |
PURPOSE: To improve the response up to binary encoding by making it possible to deal with the counted values or the like of the upper and lower bits of a binary digital signal expressing a pulse phase difference. CONSTITUTION: A ring osc...
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JP07022941 |
PURPOSE: To obtain a regenerated clock that follows input data by controlling the edge position of the regenerated clock in a regenerated clock generating means so as to be one-sidedly forwarded or delayed to the edge of the input data. ...
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JP07012864 |
PURPOSE: To allow highly precise harmonic-free detection of phase difference through simple circuitry by dividing an AC voltage through a resistor and a capacitor and measuring the phase difference of an object through the use of the div...
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JP07012863 |
PURPOSE: To allow highly precise harmonic-free detection of phase difference through a simple circuitry by connecting a resistor and a capacitor in series with an AC power supply and detecting the time width corresponding to the phase di...
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JP07007841 |
PURPOSE: To detect the ground fault of an isolated or high-resistance-grounded three-phase one-circuit transmission line with a phase voltage detector installed to one phase and, at the same time, to detect the ground-fault phase. CONSTI...
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JP07005216 |
PURPOSE: To achieve an easy to read display of a phase difference. frequency ratio and a phase lead and lag of a cyclic signal with respect to a reference signal. CONSTITUTION: Reference signals A1 and B1 shifted by 90° in phase are inp...
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JP06351261 |
PURPOSE: To allow phase detection of output current from a general purpose inverter having no circuit for detecting the phase of output current by externally providing a simple circuit. CONSTITUTION: An output current detection circuit 4...
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JP06300796 |
PURPOSE: To prevent an erroneous operation by toggling an FF when a counter for measuring a time width of a signal overflows, interrupting a calculator by a Q output of the FF, and overflow-processing it. CONSTITUTION: A carry terminal O...
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JP06284578 |
PURPOSE: To detect a step-out state without using a threshold, value by measuring power and voltage and detecting an oscillatory phenomenon in power system. CONSTITUTION: A measuring unit 1 is used for measuring active power and effectiv...
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JP06284014 |
PURPOSE: To make a delay time uniform due to a signal line and obtain uniform time resolution by setting signal line load capacitance to which plural delay elements are connected equivalent. CONSTITUTION: The NOT AND circuit NAND which i...
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JP06273463 |
PURPOSE: To compute a correlation by using an optical system and to simply and quickly find a phase in an M-series by adopting the logical sum of the computations of correlations in both M-seires. CONSTITUTION: When a correlation functio...
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JP06222092 |
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...
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JP06216721 |
PURPOSE: To improve a detection speed without deteriorating the detection resolution of a pulse phase difference by this ring oscillator by connecting even pieces of inversion circuits like a ring, and revolving stably a pulse edge. CONS...
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JP06160453 |
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...
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JP06148295 |
PURPOSE: To provide a making capacity testing circuit capable of supplying a making current having predetermined DC component content in the min. number of times and arbitrarily setting the phase order of a current in a three- phase test...
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JP06109782 |
PURPOSE: To provide a circuit for detecting voltage applied to a measurement object and a time interval corresponding to the phase difference of current flowing through the object, using the less quantity of parts including transistors, ...
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JP06066854 |
PURPOSE: To precisely measure a phase difference even when the frequency of a standard signal is fluctuated in a phase difference measuring circuit of synchronous rectifying system for detecting the fluctuation of phase of a signal compo...
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JP06058965 |
PURPOSE: To obtain a highly reliable phase meter constituted of cheap electronic components. CONSTITUTION: The apparatus for measuring phase difference between two AC signals (v), (i) having same frequency comprises a measuring frequency...
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JP06051003 |
PURPOSE: To make it possible to effectively scan and detect the output signal of a phase measuring circuit by differently subsequently prpcessing comparison signals divided into two groups based on the phase positions of the clock pulses...
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JP06043193 |
PURPOSE: To reduce the capacity of ROM. CONSTITUTION: Encoded digital signals (n-BIT) I, Q crossing each other at a right angle of two axes are inputted to an abs. value calculator 1 and abs. value data I', Q' are inputted to an address ...
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JP06034684 |
PURPOSE: To obtain a digital phase difference detection circuit which can initially set a phase difference signal and can determine the advance and delay of phase. CONSTITUTION: The title circuit is constituted of a phase comparator 10 w...
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JP06011527 |
PURPOSE: To ensure excellent linearity between a pulse phase difference and a detection output by preventing variation in delay time of a delay gate. CONSTITUTION: Delay blocks 1A and 1B are formed by connecting delay gates 11, 12a and 1...
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JP06006212 |
PURPOSE: To provide a phase comparator circuit which has the small power consumption and the high resolution by adding a 2nd pulse generating circuit and a counter to the phase comparator circuit. CONSTITUTION: The 2nd pulse generating c...
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JP06003388 |
PURPOSE: To detect the phase difference between two AC Inputs speedily and accurately with an inexpensive configuration by sampling first and second AC input values at each specified sampling frequency. CONSTITUTION: A sampling means 41 ...
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JP06003389 |
PURPOSE: To detect a phase error simply and accurately without using an expensive measuring instrument. CONSTITUTION: The device 1 is provided with a conversion transformer 3 for current and a conversion transformer 4 for voltage for tak...
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JP05346446 |
PURPOSE: To obtain a phase meter for measuring phase accurately and stably by automatically selecting an appropriate phase measuring range depending on the phase difference of input signal. CONSTITUTION: The phase meter for measuring the...
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JP05340976 |
PURPOSE: To determine phase difference highly accurately regardless of input noise by detecting predetermined point of phase for different input signals and then determining phase data of each input signal based on the detected signals a...
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JP05308728 |
PURPOSE: To reduce displacement from an actual phase synchronization point due to slip fluctuation by permitting the transmission of a closing signal over a breaker when the absolute value of phase difference in electric wires at both en...
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JP05302941 |
PURPOSE: To make clear the deviation from the phase angle of a fundamental wave by correcting the deviation of the phase angle of the nth waveform based on the result of the operation of the phase daviation between the phase angle of the...
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JP05302942 |
PURPOSE: To obtain a phase inversion detecting and correcting circuit device having simple circuitry. CONSTITUTION: A photocoupler 21, 23, 25 receives a single phase of an input polyphase AC line current, represented by phases A, B and C...
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JP05291945 |
PURPOSE: To attain the measurement of a phase difference inexpensively with high accuracy by allowing an AC component amplifier circuit to eliminate a DC component from a measured signal and a reference signal and using a phase measureme...
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JP05275992 |
PURPOSE: To measure the phase difference without using a special element by logically discriminating whether the phase difference between two pulses is within a prescribed range or not. CONSTITUTION: Pulse signals (a) and (b) are inputte...
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JP05273268 |
PURPOSE: To obtain a phase measuring apparatus wherein the frequency characteristic of the displacement of a phase in the high-frequency band of a shunt resistance for current measurement can be measured with good accuracy. CONSTITUTION:...
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JP05273272 |
PURPOSE: To accurately measure the timing difference of signals. CONSTITUTION: A timing-difference measuring apparatus is constituted of an E-O measuring device 110 and a waveform storage and operation device 210. The E-O measuring devic...
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JP05223864 |
PURPOSE: To provide a phase difference measuring device which can measure the absolute phase difference accurately. CONSTITUTION: A phase difference measuring device is provided with a rise sensor 3 to sense the rises of two RF signals p...
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JP05223924 |
PURPOSE: To eliminate the necessity of correction values to a focus delay by providing a time window opening stage to open a time window which defines the duration when a corresponding correction value is determined at a determination st...
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JP05211671 |
PURPOSE: To facilitate the measurement of the phase difference between the commercial power waveform and the video signal waveform of a power synchro nizing camera which uses the commercial frequency as the vertical synchronizing frequen...
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JP05180880 |
PURPOSE: To accurately measure a voltage phase and a voltage phase difference without being subject to the influence of the duty ratio of a short form wave signal by converting voltage at two measured spots where commercial frequency hig...
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JP05180888 |
PURPOSE: To provide a signal evaluating device capable of evaluating a signal in a simple digital construction. CONSTITUTION: Data sampled at nT/4 interval if n is an odd number is aquired from a reference signal and a signal to be evalu...
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JP05180879 |
PURPOSE: To provide a detecting method for a phase difference between two different kinds of power sources. CONSTITUTION: Two different kinds of power sources are severally inputted into a phase difference detecting circuit 3 through det...
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JP05172874 |
PURPOSE: To eliminate the influence of higher harmonics when phase difference Δθis small and speedily return the phase difference Δθ to a prescribed value when exceeding the prescribed value. CONSTITUTION: The detected phase θ' is o...
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JP05175737 |
PURPOSE: To eliminate noise (reference leakage) caused by on/off of a sampling analog switch in the sample-and-hold type phase comparator. CONSTITUTION: The two sample-and-hold type phase comparators of the entirely same configuration an...
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