发明授权
- 专利标题: Integrated oscillation circuit used for frequency conversion circuit
- 专利标题(中): 用于变频电路的集成振荡电路
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申请号: US558097申请日: 1995-11-15
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公开(公告)号: US5841326A公开(公告)日: 1998-11-24
- 发明人: Shinichi Kitazono , Fumio Ishikawa , Shinichi Tsutsumi , Naoyasu Gamou
- 申请人: Shinichi Kitazono , Fumio Ishikawa , Shinichi Tsutsumi , Naoyasu Gamou
- 申请人地址: JPX
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JPX
- 优先权: JPX4-362174 19921228; JPX4-362175 19921228; JPX4-362176 19921228
- 主分类号: H03D7/00
- IPC分类号: H03D7/00 ; H03B5/12 ; H03D7/14 ; H04N5/44
摘要:
An integrated oscillation circuit used for frequency conversion circuit in which UHF frequency conversion and VHF frequency conversion are selectively energized to use a common IF amplifier. The integrated oscillation circuit is used for a local oscillation circuit. The integrated oscillation circuit including a connection terminal connected to an external resonance circuit and an input line of a mode switching signal which is set at a different level in response to an operation mode, an oscillation element, a bias terminal of which is connected to the connection terminal, a detection circuit detecting the level of the mode switching signal applied to the bias terminal of the oscillation element, and a switching circuit turning on and off a power source for driving the oscillation element in response to the level detected at the detection circuit.