Phase shift angle detector

Details Phase shift angle detector Phase shift angle detector

1989-03-30

1991-11-26

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 86, 329306, H03D 322

Patent

active

050688766

ABSTRACT:
A phase shift angle detector for detecting a phase shift angle of a multiphase modulated signal includes a first multiplier coupled with a first low pass filter for producing a cosine wave signal having a phase which is a sum of a phase shift .phi.e and the modulated signal g(t), and a second multiplier coupled with a second low pass filter for producing a sine wave signal having a phase which is a sum of a phase shift .phi.e and the modulated signal g(t). A circuit is provided for calculating an inverse tangent using the cosine wave signal and the sine wave signal to produce a signal representing the pahse shift .phi.e.

REFERENCES:
patent: 3806815 (1974-04-01), Fletcher et al.
patent: 4317210 (1982-02-01), Dekker et al.
patent: 4731796 (1988-03-01), Masterton et al.

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