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JP2005308510A |
To provide an apparatus capable of measuring phase noises with lower levels in comparison with conventional ones.The apparatus for measuring phase noises, which measures the phase noises of a signal to be measured by carrying out a corre...
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JP2005308511A |
To provide a method and an apparatus capable of measuring phase noises with lower levels in comparison with conventional ones.In the method, a first phase signal representing a phase of a signal to be measured is generated by using a fir...
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JP2005308512A |
To enable phase noises with lower levels to be measured in comparison with conventional methods.A method is provided, in which a spectrum being obtained from a signal to be measured and corresponding to frequencies having regular interva...
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JP2005295544A |
To provide a high performance phase detector including a local digital oscillator which generates a digital reference signal with a frequency and a phase controllable by a program.The phase detector stores a phase difference between the ...
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JP2005287256A |
To attain flexible handling and effective use of display data and properly make a phase indication even if the effective value of a phase reference element is not sufficiently obtained.This display device 1 comprises an input converter 6...
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JP3699488B2 |
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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JP3694977B2 |
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...
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JP3696306B2 |
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...
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JP3692405B2 |
To provide a performance measurement system and method capable of measuring the time axis fluctuation in a converter between an analog signal and a digital signal, etc. Conversion between the analog signal and the digital signal is execu...
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JP2005221375A |
To solve the problem that a correlator with a conventional configuration which can determine a precise complex amplitude ratio of two waves (electromagnetic waves) but needs a calibration procedure where a phase shifter is previously shi...
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JP3683779B2 |
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...
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JP2005218108A |
To provide a method for performing variable phase bit sampling that minimizes requirements for resynchronization of downstream digital processing in a system incorporating adjustable bit phase sampling.A sampling device is provided with ...
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JP3665512B2 |
To make detectable a phase difference between two input signals by counting a second input signal by a counter reset for every change in a first input signal and outputting a digital value according to the frequency ratio of the two inpu...
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JP2005140532A |
To detect the leakage current caused by insulation resistance to the ground.The leakage current detection device comprises a leakage current detection part for detecting the leakage current from a measuring wireway; an amplifying part fo...
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JP3646139B2 |
To discriminate the type of precise charged particles and accurate energy, to enable the accurate measurement of a charged particle having high energy, and to detect a fault in a measuring apparatus to continue observation in a mode corr...
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JP2005512099A |
An oscilloscope apparatus for scaling and displaying persistence data using interpolation. The oscilloscope apparatus acquires a waveform and accumulates persistence data of the acquired waveform in a results buffer. The size of the pers...
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JP2005106637A |
To accurately detect the generation time of the change point of signal to be measured at a low cost.A function signal fm, generated in synchronization with the change point of a signal M to be measured, is sampled by a clock signal CK us...
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JP2005077092A |
To solve the problem that it has been impossible to measure the waveforms of a commercial power supply due to the simultaneous disappearance of periodic zero-cross points in the waveforms of the commercial power supply when a system volt...
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JP3621086B2 |
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JP3620463B2 |
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JP2005030978A |
To solve the problems, wherein the amount of phase shift is changed delicately between phase measurement ranges and hence measurement precision cannot be improved when the frequency of an input signal to be measured is changed, since pro...
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JP2005030977A |
To solve the problems, wherein a circuit does not operate normally when the phase difference between two signals becomes close to 0° or 180° since a D-type flip-flip circuit requires setup time and hold time when polarity is determined...
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JP2005033848A |
To calculate a phase angle precisely at each part of a power system even when the voltage deviates significantly from a rated value or when a transmission loss can not be neglected.Phase angle calculation routes are made from two specifi...
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JP3609780B2 |
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JP2005003530A |
To continuously, appropriately at high speed, and stably precisely detect the phase of a single-phase AC system voltage.This phase detector has a phase shift means 6 for forming a signal having a phase different from that of the single-p...
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JP3605022B2 |
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 ...
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JP2004309472A |
To calibrate balanced signals so as to create appropriate phases with respect to desired phase settings.The electric power difference between the balanced signals is measured. A level acquired as a result is used to control the phase bet...
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JP2004301550A |
To provide a highly-accurate and noise-resistant operation device of a power related quantity and a phase angle, not using a zero cross point.This device has a constitution equipped with power operation means 17A, 18A, 19A for operating ...
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JP3570902B2 |
By applying a modification considering a frequency difference to a phase error signal, phase lock is established in a short period of time even when there is a frequency difference. A jump detector detects a discontinuous jump of the pha...
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JP3568099B2 |
To provide a digital phase information generating device for generating plural kinds of arbitrary phase information. An adder 1 adds a phase progress input X and the output of a selecting device 4. A holding device 2 holds the output of ...
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JP3566174B2 |
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...
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JP3561119B2 |
To constitute a synchronization controller which is not affected by the distortion and unbalance of AC signals of software using a microprocessor, etc. Three-phase AC signals are synchronized to the output of a frequency divider by means...
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JP2004239860A |
To provide a phase difference measuring circuit capable of measuring phase difference between the signals to be measured by a DC voltage value, with no direct observation with instruments such as an oscilloscope with an intervention of a...
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JP3552779B2 |
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JP2004205346A |
To solve the problem that, when a CPU having a small capacity is used, the burden becomes heavier at the time of continuously measuring the phase difference between two input signals at a plurality of spots and averaging the measured pha...
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JP3546013B2 |
To reduce a scale of a circuit of a signal processing device for measuring pulse intervals of plural input signals. First through third signals 101-103 are time-divisionally selected, and an increment value stored in an address correspon...
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JP2004198153A |
To provide a phase comparison circuit capable of detecting a phase difference between signals outputted from coils of a toner detecting magnetic sensor.This phase comparison circuit 26 is composed of: an XOR gate 200 for comparing phases...
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JP3541345B2 |
To easily measure and adjust quadrature modulation waves and to reduce excessive circuits mounted on a substrate as much as possible. In the quadrature modulation circuit board 5 of a double conversion system, the monitor output of respe...
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JP3540797B2 |
To solve such a problem (that measuring precision gests worse in &verbar a1&verbar <&verbar a2&verbar when a complex amplitude ratio W=a2/a1 of two waves a2, a1 is found) in a 6-port type correlator of a highly precise and a simple phase...
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JP2004184300A |
To provide an AC signal phase detecting arrangement of low cost which does not require expensive transformer for insulation.The voltage of an AC power supply 7 is converted into a rectangular form wave by a photocoupler 10 and is inverte...
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JP2004132824A |
To provide a delay measuring mechanism in an LSI chip capable of precisely measuring a delay amount of a delay element in the LSI chip.A delay element cycling pulse generating part 1 generates a cycling pulse according to the delay amoun...
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JP3508718B2 |
To accurately detect an amplitude of an input sine wave shaped signal by a simple composition. An analog signal including a sine wave signal Ax.sin(2πFt+ψ) of a frequency the same as a known reference analog sine wave signal A0.sin2πf...
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JP3507838B2 |
To detect the phase of a power fundamental wave in real time for following. A programmable timer 19 generates a trigger with a timing where one wavelength section of the current or a voltage of a power fundamental wave is divided into N ...
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JP2004061339A |
To make a phase detector actualizable phase detection without using a second clock of a different frequency.N-pieces of midway nodes CK1(1) to CK1(N) made by N-dividing a delay circuit 1 using a basic clock 1 as input are used as clock i...
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JP3481065B2 |
To prevent the malfunction of a circuit in a DLL(delay locked loop) circuit using a high speed clock signal by comparing the phases of output signals of first and second control circuits frequency-divided according to a third signal. A f...
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JP3479055B2 |
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...
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JP3464792B2 |
To easily visually grasp the phase relation between the stator winding and rotator magnetic pole of a synchronous motor. When the phase difference angle generated between the stator winding and rotor magnetic pole of the synchronous moto...
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JP2003315395A |
To improve the practicality by expanding a measuring range of phase difference by a phase comparator, having a phase comparison range of 180 degrees, to 360 degrees.A first phase comparator 9 compares the phases of reflected wave B gener...
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JP3463575B2 |
To provide a phase comparator which consists of a full digital circuit of high performance at a low cost. An exclusive OR is secured via an exclusive OR gate 22 and accordingly the phase difference value is detected for the signals which...
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JP3460145B2 |
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 ...
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