H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18, 350/38
H04N 5/76 (2006.01) H04N 5/931 (2006.01) H04N 9/793 (2006.01)
Patent
CA 1061454
ABSTRACT OF THE DISCLOSURE A gain control circuit for a video signal reproducing apparatus provides a variable gain circuit in the repro- duced video signal path and an amplitude detector cir- cuit to which a pilot signal separated from the repro- duced video signals is applied. The gain control circuit has N series circuits, each consisting of a series- connected capacitor and a switching element, each of the series circuits corresponding to one of the trans- ducers of the video signal reproducing apparatus. The series circuits are connected to form a parallel circuit across which is applied an output signal from the am- plitude detector circuit to supply a gain control signal to the variable gain circuit. Further, each switching element of the series circuits is controlled to be conductive only during the intervals during which a reproduced video signal is obtained from a corresponding rotary head.
201905
Na
Sony Corporation
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