Method and circuit for detecting and compensating for...

Details Method and circuit for detecting and compensating for... Method and circuit for detecting and compensating for...

H - Electricity

04

N

352/18.5

H04N 5/78 (2006.01) H04N 5/94 (2006.01)

Patent

CA 1070009

ABSTRACT OF THE DISCLOSURE: A circuit for use in a magnetic video tape recorder/playback system capable of detecting not only amplitude loss due to tape detects or less of head-tape contact, but also zero crossing loss due to an increase of sideband amplitude with respect to carrier amplitude in the playback signal. The circuit comprises a high speed voltage comparator coupled to a one-shot and OR gate arrangement to cause the insertion of a compensating video signal should the FM playback signal fail to have a zero crossing and pass through a threshold level within a predetermined time period.

235117

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