发明授权
US4179671A Capacitor switching circuits for adjusting crystal oscillator frequency
失效
用于调整晶体振荡器频率的电容开关电路
- 专利标题： Capacitor switching circuits for adjusting crystal oscillator frequency
- 专利标题（中）： 用于调整晶体振荡器频率的电容开关电路
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申请号： US866420申请日： 1978-01-03
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公开(公告)号： US4179671A公开(公告)日： 1979-12-18
- 发明人: Hirohiko Yoshida , Fumio Nakajima
- 申请人： Hirohiko Yoshida , Fumio Nakajima
- 申请人地址： JPX
- 专利权人： Citizen Watch Company Limited
- 当前专利权人： Citizen Watch Company Limited
- 当前专利权人地址： JPX
- 优先权： JPX52-841 19770110; JPX52-2151 19770112
- 主分类号： G04F5/06
- IPC分类号： G04F5/06 ; H03B5/36 ; H03K3/354
摘要：
A piezo-electric oscillator composed of a quartz crystal, an inverting amplifier connected across the quartz crystal, an output capacitor connected to an output side of the quartz crystal, and a plurality of input capacitors. The input capacitors are selectively coupled to the input side of the quartz crystal by means of an electronic switching means by which an output frequency of the quartz crystal is adjusted to a prescribed value.