Invention Grant
- Patent Title: Balanced and unbalanced electronic circuit and television tuner
- Patent Title (中): 平衡和不平衡电子电路和电视调谐器
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Application No.: US11479286Application Date: 2006-06-30
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Publication No.: US07650124B2Publication Date: 2010-01-19
- Inventor: Masaki Yamamoto
- Applicant: Masaki Yamamoto
- Applicant Address: JP Tokyo
- Assignee: Alps Electric Co., Ltd.
- Current Assignee: Alps Electric Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Beyer Law Group LLP
- Priority: JP2005-248236 20050829
- Main IPC: H04B1/18
- IPC: H04B1/18

Abstract:
A television tuner includes an unbalanced output type VHF-side block, a balanced output type UHF-side block, and a mixing circuit that performs frequency conversion on the output from the VHF-side block or the UHF-side block. In the television tuner, in a first mode where the VHF-side block is connected to the mixing circuit, a first terminal, to which the unbalanced output is applied, is coupled to a first input terminal of the mixing circuit, and a second input terminal of the mixing circuit is grounded. Further, in a second mode where the UHF-side block is connected to the mixing circuit, a second terminal and a third terminal, to which the balanced output is applied, are coupled to the first and second input terminals of the mixing circuit.
Public/Granted literature
- US20070046834A1 Balanced and unbalanced electronic circuit and television tuner Public/Granted day:2007-03-01
Information query