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2G030 | Measuring phase differences | |
G01R25/00 -25/08 |
G01R25/00-25/08 | AA | AA00 MEASURED QUANTITIES |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | ||||
. 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 | |||||||
AB | AB00 CIRCUITS THAT PROCESS THE SIGNALS MEASURED |
AB01 | AB02 | AB03 | AB04 | AB05 | ||||||
. Multiplying circuits | . Frequency dividing circuits | . Phase shifting circuits, delay circuits | . Frequency converting circuits, modulating circuits | . Phase holding circuits, oscillating circuits for substitution | ||||||||
AC | AC00 CIRCUITS THAT GENERATE DIFFERENTIAL PHASE WIDTH SIGNALS |
AC01 | AC02 | AC03 | AC04 | AC05 | AC06 | AC07 | AC08 | |||
. 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 | |||||
AD | AD00 MEASURING MEANS |
AD01 | AD02 | AD03 | AD04 | AD05 | AD06 | AD07 | AD08 | AD09 | AD10 | |
. 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 | |||
AE | AE00 DISPLAY MEANS |
AE01 | AE02 | AE03 | AE04 | AE05 | ||||||
. Voltmeters, ammeters | . Digital displays | . Cathode ray tubes (i.e., CRT) | . Lamps, light-emitting elements | . Variants that display phase advance and lag simultaneously | ||||||||
AF | AF00 FUNCTIONS, CONTROL |
AF01 | AF02 | AF03 | AF04 | |||||||
. 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 | |||||||||
AG | AG00 PURPOSE, OTHERS |
AG01 | AG02 | AG03 | AG04 | AG05 | AG06 | AG07 | ||||
. 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 |