Circuit arrangement for detecting a switching phase

Details Circuit arrangement for detecting a switching phase Circuit arrangement for detecting a switching phase

1979-07-09

1981-07-07

Konick, Bernard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 18, 360 37, H04N 576, H04N 947, H04N 578

Patent

active

042777950

ABSTRACT:
As is known the phase of the chrominance signal is changed in a specific rhythm for the elimination of cross-talk during recording on a magnetic tape, spurious signals being cancelled via a comb filter. By means of an inverse combination stage after the comb filter an opposite signal is obtained, which with the normal output signal yields a correction signal via a differential amplifier in the case of an incorrect demodulation phase.

REFERENCES:
patent: Re28823 (1976-05-01), Coleman, Jr.
patent: 3721753 (1973-03-01), Mima
patent: 3877066 (1975-04-01), van Gils et al.
patent: 4024571 (1977-05-01), Dischert et al.
patent: 4024572 (1977-05-01), Derenbecher, Jr.

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