发明申请
- 专利标题: TELEVISION TUNER
- 专利标题(中): 电视调谐器
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申请号: US12358176申请日: 2009-01-22
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公开(公告)号: US20090201429A1公开(公告)日: 2009-08-13
- 发明人: Masaki YAMAMOTO
- 申请人: Masaki YAMAMOTO
- 申请人地址: JP Tokyo
- 专利权人: ALPS ELECTRIC CO., LTD.
- 当前专利权人: ALPS ELECTRIC CO., LTD.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2008-031669 20080213
- 主分类号: H04N5/50
- IPC分类号: H04N5/50
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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