Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1980-06-24
1982-05-11
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358167, H04N 576, H04N 521
Patent
active
043297129
ABSTRACT:
The present invention describes non-linear circuitry for reducing intermodulation distortion occurring in signals recovered from a disc record. The non-linear circuit generates complementary signals in a diode modulator for cancelling the undesired distortion components of the recovered signal. A synchronous detector in a servo loop with the non-linear circuit samples the distortion component of the resultant baseband video signal and applies bias to condition the non-linear circuit to further reduce the distortion-components. A reference signal for the detector is derived from the sound components of the recovered signal.
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Terman, "Electronics & Radio Engineering", 4th Edition, 1955, pp. 1007-1010.
Herrmann E. P.
Psitos Aristotelis M.
RCA Corporation
Tripoli J. S.
Whitacre E. M.
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