Accurate phase-measuring system using arithmetic synthesis

Details Accurate phase-measuring system using arithmetic synthesis Accurate phase-measuring system using arithmetic synthesis

1977-08-15

1979-03-13

Ruggiero, Joseph F.

Boots, shoes, and leggings

324 83D, 328133, 328155, 364604, G01R 2500, G06J 100, H03B 304

Patent

active

041445724

ABSTRACT:
Circuit for comparing the difference in phase between two signals having like waveforms and adjusting the phase of one until the difference is zero. Two waveform generators, controlled by signals derived from the same clock source, produce the signals to be measured. One control signal is derived from the clock source by a fixed divider; the other, using an arithmetic synthesizer. The phase of the other control signal is adjusted by changing the frequency number of the arithmetic synthesizer and the phase difference is available as a binary number of n bits, where n is an integer. Precision of phase measurement in femtoseconds is possible.

REFERENCES:
patent: 3663956 (1972-05-01), Purdy et al.
patent: 3895294 (1975-07-01), Vinding
patent: 3898579 (1975-08-01), Aldridge
patent: 3913028 (1975-10-01), Bosselaers
patent: 3973209 (1976-08-01), Nossen et al.
patent: 3982190 (1976-09-01), Schaefer

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