Television receiver with a ghost detector

Details Television receiver with a ghost detector Television receiver with a ghost detector

H - Electricity

04

N

350/81

H04N 5/21 (2006.01)

Patent

CA 1132247

ABSTRACT OF THE DISCLOSURE A television receiver is disclosed in which there are provided a television signal receiving circuit including RF and IF stages; a video detector connected to the television signal receiving circuits; an AGC circuit connected between the video detector and television signal receiving circuit for automatically controlling the gain of the latter, the AGC circuit having a predetermined time constant; and a ghost detector connected to the video detector for detecting a ghost signal during a certain period in a vertical blanking period of the video signal from the video detector. In this case, a switching device is provided for switching the AGC circuit at least during the certain period the vertical blanking period such that the detected ghost level is not substantially in- fluenced by the transient level change of the AGC circuit.

348559

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