FIELD STRENGTH OPTIMIZATION CIRCUIT AT EVERY CHANNEL OF TELEVISION RECEIVER

PROBLEM TO BE SOLVED: To improve receiving performance of a television receiver in a signal state which the RF-AGC of a tuner can not control in an area where a channel of weak electric field and a channel of strong electric field exist at the same time. SOLUTION: A circuit 3 which switches its gain...

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Bibliographic Details
Main Author OKAZAKI TOSHIHIRO
Format Patent
LanguageEnglish
Published 14.01.2000
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:PROBLEM TO BE SOLVED: To improve receiving performance of a television receiver in a signal state which the RF-AGC of a tuner can not control in an area where a channel of weak electric field and a channel of strong electric field exist at the same time. SOLUTION: A circuit 3 which switches its gain with voltage control is attached to a booster 2, the gain control terminal of the circuit 3 is connected to a microcomputer 7 for channel selection control and a memory 8 which stores control voltage for each channel. And, gain control voltage of the booster which is stored in the memory 8 and is suitable for a channel is supplied to the booster 2 the moment the channel is switched.
Bibliography:Application Number: JP19980180125