Phase detector

Details Phase detector Phase detector

1998-09-30

2000-04-18

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

327 7, 327231, 327237, 327248, H03K 526

Patent

active

060519967

ABSTRACT:
The present invention is a method and an apparatus for measuring phase differences between signals A and B using an absolute voltage value for each phase difference between .+-.180.degree.. This is accomplished using a third signal C, which is a signal having a phase approximately equal to the average phase between signals A and B. Signals C and A are subsequently amplitude limited and mixed to produce a fourth signal D, which is a signal having associated an absolute voltage value for each degree of phase difference between .+-.180.degree. for signals A and B.

REFERENCES:
patent: 4048580 (1977-09-01), Campbell et al.
patent: 5381444 (1995-01-01), Tajima
patent: 5400363 (1995-03-01), Waugh et al.

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