F-Term-List

G01R25/00-25/08

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MEASURED QUANTITIES

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. Measuring phase difference values

. Distinguishing phase advance or lag

. Determining whether phase differences are within a prescribed range

. Detecting phase matching

. Measuring phase fluctuation, rate of change

. Measuring the amount of deviation of phase difference from reference values

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CIRCUITS THAT PROCESS THE SIGNALS MEASURED

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. Multiplying circuits

. Frequency dividing circuits

. Phase shifting circuits, delay circuits

. Frequency converting circuits, modulating circuits

. Phase holding circuits, oscillating circuits for substitution

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CIRCUITS THAT GENERATE DIFFERENTIAL PHASE WIDTH SIGNALS

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. Flip-flop circuits

. . D-flip-flop circuits

. . T-flip-flop circuits

. Logic circuits

. . AND circuits, NAND circuits

. . OR circuits, NOR circuits

. . Exclusive logical sum circuits

. Synthesizing circuits

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MEASURING MEANS

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. Counters

. . Reversible counters

. Variants that find the average values of phase difference width signals

. Variants that find the time integral of phase difference width signals

. Time limiting circuits, timers

. Phase detecting circuits, phase lock loop rectifying circuits

. Phase comparison circuits, variants that use thyristors

. Variants that calculate using calculating circuits

. . Variants that calculate sampling values

. Variants that sample and hold values corresponding to phase differences

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DISPLAY MEANS

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. Voltmeters, ammeters

. Digital displays

. Cathode ray tubes (i.e., CRT)

. Lamps, light-emitting elements

. Variants that display phase advance and lag simultaneously

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FUNCTIONS, CONTROL

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. Control using computers, CPU's

. Variants that find averages for measured values a prescribed number of times

. Variants that can measure phase differences of 2 or greater

. Variants that detect the presence or absence of measured signals

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PURPOSE, OTHERS

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. Compensation for frequency fluctuation

. . Variants that find the ratio of phase difference and period

. Eliminating the effects of zero level fluctuation, waveform distortion

. . Variants that find the time differences between pulse centers

. Eliminating the effects of jitter, noise

. Measuring the amount of phase shift in measured circuits

. Calibrating of, testing of, detecting breakdowns in measuring equipment

2G030	Measuring phase differences
	G01R25/00 -25/08