发明申请
US20090201429A1 TELEVISION TUNER 审中-公开
电视调谐器

TELEVISION TUNER
摘要:
In the television tuner, between an input part of a VHF tuning circuit 2 and the ground, inductor grounded circuits that ground via inductors are formed. Further, to the inductor grounded circuit, a switch diode D2 that operates in synchronization with a VHF high band reception operation and a switch diode D1 that turns on/off at a reception of a certain channel are disposed in parallel. By the on/off operation of the switch diodes D1 and D2, at a reception of UHF/VHF high band, a HPF for suppressing a signal in a low band side to a reception frequency is formed, and at a reception of VHF low band, a LPF that suppresses a signal in a high band side to a reception frequency is formed.
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