Television – Receiver circuitry – Television receiver adapted to receive radio broadcast or in...
Reexamination Certificate
2005-04-05
2005-04-05
Yenke, Brian P. (Department: 2614)
Television
Receiver circuitry
Television receiver adapted to receive radio broadcast or in...
C348S736000, C348S737000, C455S188100, C455S193300
Reexamination Certificate
active
06876401
ABSTRACT:
A trap circuit system includes a first trap portion and a second trap portion. In the first trap portion, a first capacitor is provided in parallel to a first switch diode. A control voltage is applied to the cathode of the first switch diode so as to change the trap frequency. In the second trap portion, a control voltage is applied to the cathode of a varactor diode so as to change the trap frequency. In the trap circuit system, when a television signal is received, the video intermediate frequency signal and the audio intermediate frequency signal in the lower adjacent channel are attenuated. When an FM broadcast signal is received, the video intermediate frequency signal and the chrominance subcarrier frequency signal are attenuated.
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Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Yenke Brian P.
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