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Patent Searching and Data


Matches 601 - 650 out of 2,074

Document Document Title
JPH09321616A
To realize a phase comparator whose operation is surely stable, whose circuit configuration is simple, in which simplified wiring and layout design are facilitated and dependency on the design is reduced. Edge detection circuits EDT1, ED...  
JP2685922B2  
JPH09307433A
To provide a PLL(phase locked loop) circuit which can shorten the time when the phase difference gets near zero and also can increase the loop operation speed. A phase/frequency detection circuit 16 decides whether the phase difference b...  
JP2552944Y2  
JP2670360B2  
JPH09271176A
To reduce the harmonic components of a sine wave current of a power-system linked power converting means, by generating the output voltage command value of the power converting means so as to add to it the correcting quantity for correct...  
JPH09266500A
To separate high speed data and to recover the data by activating a phase locked loop in which a clock signal regenerated from the data is nearly equal to a frequency equivalent to a data speed. A data sampling unit 100 of a detection un...  
JPH09264909A
To increase the input phase difference which can be detected by eliminating discontinuous points in the output signals outputted from a phase difference detecting circuit and imparting continuous property. A comparator 1 detects the lead...  
JPH09261043A
To provide a PLL frequency synthesizer by which a signal frequency is locked up to a setting frequency at a high speed. A comparison frequency divider 12 frequency-divides a frequency signal fv to outputs a comparison signal fp. A phase ...  
JPH09257845A
To suppress the divergence of the frequency far apart from the system frequency even if an infinitesimal vibration voltage is retained by providing a lower limit limiter having a predetermined lower limit in output means of a standard va...  
JP2659594B2  
JP2657363B2  
JPH09243681A
To obtain a phase detector by which synchronization can be detected smoothly and without any instantaneous break even when AC buses are changed over. In a state that an AC bus 201 is used, an AC bus 202 is used for the maintenance of the...  
JPH09229975A
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...  
JPH09232948A
To obtain a phase detector with high resolution and easily configured by using a reference signal having a nominal reference frequency and a local signal with a nominal frequency. A scaled signal has a nominal frequency which is M/(M±1)...  
JP2646845B2  
JP2645374B2  
JP2645268B2  
JP2642421B2  
JPH09507103A  
JPH09166624A
To provide a phase correcting method by which the phase shift of a sampling block can be detected accurately. In the phase correcting method, the peak value of an inputted AC wave is found in accordance with a sampling clock at two sampl...  
JPH09162728A
To provide a phase comparator small in the blind sector of a phase difference, excellent in input/output characteristics and capable of being operated stably at a low power supply voltage. The phase difference of a reference clock signal...  
JP2619448B2  
JPH09153794A
To provide an integrable and more precise phase detection circuit which corresponds to digital circuit technics. This integrated circuit is provided with the phase detection circuit with an exclusive gate 42 with first and second gate in...  
JPH09145756A
To easily correct an amplitude error due to a gain difference between an I signal system and a Q signal system in a cross detector used for measuring phase and amplitude. A switch 18 is provided to select a reference signal sr(t) and an ...  
JPH09145757A
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) ...  
JPH09140147A
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...  
JPH09505143A  
JPH09133718A
To correct a phase by the amplitude of an AC system voltage so as to properly detect a phase even when an accident occurs because when an accident occurs in the AC system during phase detection, the amplitude of the AC system becomes sma...  
JPH09123911A
To measure the periodically changing alternating current waveform with high accuracy even when it is disturved. In a phase-shift detecting method, a standard time interval given by integer times the period is determined, (1) the time fro...  
JPH0989946A
To precisely detect an A.C phase and a zero cross point. A transducer 1 drops an A.C. voltage 100, and a voltage comparator 2 compares a secondary voltage of the transducer 1 with a ground voltage. A pulse generator 3 produces a phase si...  
JP2594141B2  
JP2591137B2  
JP2619194B2
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...  
JPH0961472A
To realize a phase difference measuring apparatus having small circuit scale and improving the measuring accuracy. The phase difference measuring apparatus simultaneously fetches a pair of first and second signals having different phases...  
JP2584459B2  
JP2578373B2  
JPH0926445A
To rapidly calculate phase angle by inputting two signals of AC voltage and AC power supply voltage obtained by converting AC power supply current to a pulse gate circuit between phase angles, and being based on a pulse increase obtained...  
JPH0921835A
To simplify constitution and shorten computation time by providing a zero phase detection part for detecting the voltage zero phase, a phase error correction part for correcting sampling errors of a digital control system and the like. A...  
JPH0915276A
PURPOSE: To make it possible to measure phase difference with high resolution and high accuracy. CONSTITUTION: A waveform shaping circuit 2a shapes the waveform of a signal to be measured. A phase shifter 3 makes the phase of a reference...  
JP2572575B2  
JP2521658Y2  
JP2559103B2  
JP2560007B2  
JPH08316826A
PURPOSE: To incorporate a device generating an operating clock synchronism with an external clock into a microcomputer with a comparatively small circuit area. CONSTITUTION: A signal period detection circuit 3 coding a period of an exter...  
JPH08304484A
PURPOSE: To detect a voltage of a power source or a phase of a current without being influenced by a distortion of the voltage of the power source, by integrating an angular velocity output from an adding means and outputting an integrat...  
JPH08304483A
PURPOSE: To correctly obtain a power source phase with a high detection frequency by compensating for a phase error detected with a first frequency by means of a second frequency. CONSTITUTION: The apparatus has an angular velocity opera...  
JP2554511B2  
JPH08298457A
PURPOSE: To set the number of bits optionally by comparing phase differences of two input signals and providing a specific pulse signal when it is detected that the phase difference is within a preset phase difference. CONSTITUTION: An i...  
JPH08262075A
PURPOSE: To enable accurate measurement of a phase difference even when the frequency, amplitude and DC level of a measuring signal are varied. CONSTITUTION: A signal for correction of which the phase difference is known is prepared from...  

Matches 601 - 650 out of 2,074