Phase detection in phase lock loop circuit

Details Phase detection in phase lock loop circuit Phase detection in phase lock loop circuit

1975-08-28

1976-08-03

Kominski, John

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

307232, 307262, 328155, 328127, 329104, 331 14, 331 17, H03D 300

Patent

active

039732126

ABSTRACT:
Phase detection in a phase lock loop circuit is performed by periodically sampling the A. C. carrier communication signal applied thereto in response to a sample timing signal having a periodic frequency twice that of the carrier and a polarity check signal which is indicative of the polarity of the communication signal at a predetermined interval prior to each sample timing signal, one polarity enabling a sample to be taken and the opposite polarity inhibiting it.

REFERENCES:
patent: 3866133 (1975-02-01), Debloois et al.
patent: 3906376 (1975-09-01), Bass
patent: 3919651 (1975-11-01), Le Mouel
patent: 3925732 (1975-12-01), Tanaka et al.

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