System for automatically correcting the duty factor of the carri

Details System for automatically correcting the duty factor of the carri System for automatically correcting the duty factor of the carri

1977-07-15

1979-02-27

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 358128, 360 33, 360 36, H04N 576, G11B 700

Patent

active

041422082

ABSTRACT:
The present invention relates to the read-out of a data carrier having a track along which there is transcribed an angularly modulated carrier wave. In accordance with the present invention, there is provided a system for processing the read-out signal, which uses a feedback loop correcting the duty factor of a restored rectangular waveform when its value deviates from the value 0.5.

REFERENCES:
patent: 3906152 (1975-09-01), Hoogendijk
patent: 3909608 (1975-09-01), LeMerer et al.
patent: 3913076 (1975-10-01), Lehureau et al.
patent: 3988531 (1976-10-01), Laub
patent: 3988532 (1976-10-01), Korpel

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