Phase detector

Details Phase detector Phase detector

1997-07-28

1998-11-24

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 515, 342194, G01C 308, G01S 1300

Patent

active

058415220

ABSTRACT:
A phase detector includes a mixer circuit responsive to an input signal and a reference signal to produce an error signal which is a function of the phase difference between the input signal and the reference signal; a phase shifting circuit varies the phase difference between the input and reference signals; a control circuit responsive to the error signal provides a drive signal to the phase shifting circuit to set to quadrature the phase difference between the input and reference signals; and a phase indicator device responsive to the drive signal indicates the phase difference between the component and reference signals.

REFERENCES:
patent: 5150128 (1992-09-01), Kungelbeck
patent: 5517197 (1996-05-01), Algeo et al.
patent: 5745437 (1998-04-01), Wachter et al.

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