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Patent Searching and Data


Matches 551 - 600 out of 952

Document Document Title
JP04125471A
PURPOSE: To enable reliability to be improved and cost to be reduced with a simple circuit configuration by dividing a phase difference signal which is in proportion to a multi-phase AC voltage by the amplitude and reducing influ ence of...  
JP04113941A
PURPOSE: To improve accuracy of monitoring of abnormality by computing torque factor which surely varies by short-circuit through wheels from phase difference and the like between detected local coil voltage and track coil voltage, and m...  
JP04093665A
PURPOSE: To improve the extent of measuring accuracy by using only an area high in linearity, excepting the neighborhood of an apex, where an error is large, of a chopping signal so far used in the conventional phase difference measuring...  
JP04080665A
PURPOSE: To always enable the using of the newest cycle detection value by a method wherein a clock pulse is integrated with a cycle detection counter during a period of one half wave of a symmetrical wave and an integrated value thereof...  
JP04072578A
PURPOSE: To easily design a circuit for measuring phase differences by measuring the phase difference between signals output from first and second power lines via first and second input circuits, and finding the phase difference between ...  
JP04058162A
PURPOSE: To easily measure the voltage of a high-voltage part at low cost by receiving the output of a transmitting means which sends the output of a voltage sensor to an earth-potential side and displaying the voltage of the high-voltag...  
JP04052564A
PURPOSE: To eliminate the need for balance adjustment of a mixer and enable a peripheral circuit to be simplified by calculating phase difference of input and output waves of a mixer based on the A/D converted data. CONSTITUTION: Input/o...  
JP04040377A
PURPOSE: To improve resolution in a phase difference detection and to attain a low power consumption and high resolution of a circuit by constituting the circuit so that the phase to be detected is oscillated in the direction of time axi...  
JP03291573A
PURPOSE: To check the polarity of the coil automatically by impressing an AC signal to a detection coil and inducing a voltage across a coil to be tested and comparing its phase with the terminal voltage across the detection coil. CONSTI...  
JP03279872A
PURPOSE: To decide the phase of an input signal without being affected by its waveform distortion by deciding that the phase is advanced when the value found by an arithmetic means is negative or delayed when positive. CONSTITUTION: A 1s...  
JP03231161A
PURPOSE: To enhance phase detection accuracy by providing two adding means for adding three-phase AC instantaneous values, two dividing means for dividing the respective sums and a phase detecting means. CONSTITUTION: Adders 1, 2 respect...  
JP03220814A
PURPOSE: To expand the coding enable range without incurring a large area of the circuit by circulating signal delay circuits connected in a ring with one pulse and forming a high-order bit of a digital signal representing a phase differ...  
JP03214069A
PURPOSE: To measure a phase difference between AC signals in a wide frequency range by measuring frequencies of the AC signals to generate a clock signal having a frequency multiplied at a specified factor as much as a frequency to be me...  
JP03214070A
PURPOSE: To measure a frequency of a signal to be measured at a high accuracy regardless of changes therein by plotting sampling data of two signals to be measured with almost fixed amplitudes on an XY coordinates to calculate a phase di...  
JP03206973A
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...  
JP03202785A
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 ...  
JP03197875A
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...  
JP03194476A
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. ...  
JP03180770A
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...  
JP03162678A
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...  
JP03140884A
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...  
JP03130668A
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...  
JP03125514A
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...  
JP03120478A
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...  
JP03113382A
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...  
JP03111787A
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 ...  
JP03096869A
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...  
JP03092775A
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...  
JP03092774A
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...  
JP03085466A
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...  
JP03082969A
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...  
JP03082970A
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...  
JP03080620A
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...  
JP03075573A
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...  
JP03073866A
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...  
JP03054481A
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...  
JP03040542A
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...  
JP03009268A
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...  
JP02298872A
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...  
JP02291974A
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...  
JP02278174A
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...  
JP02272365A
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...  
JP02268276A
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...  
JP02227672A
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...  
JP02212775A
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...  
JP02201170A
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...  
JP02198368A
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...  
JP02194366A
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(...  
JP02173578A
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...  
JP02168809A
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...  

Matches 551 - 600 out of 952