发明授权
US07449972B2 Voltage controlled oscillator with anti supply voltage variation and/or process variation
失效
具有抗电源电压变化和/或工艺变化的压控振荡器
- 专利标题: Voltage controlled oscillator with anti supply voltage variation and/or process variation
- 专利标题(中): 具有抗电源电压变化和/或工艺变化的压控振荡器
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申请号: US11183901申请日: 2005-07-19
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公开(公告)号: US07449972B2公开(公告)日: 2008-11-11
- 发明人: Kai-Cheung Juang , Horng-Yuan Shih , Peng-Un Su
- 申请人: Kai-Cheung Juang , Horng-Yuan Shih , Peng-Un Su
- 申请人地址: TW Hsinchu
- 专利权人: Industrial Technology Research Institute
- 当前专利权人: Industrial Technology Research Institute
- 当前专利权人地址: TW Hsinchu
- 代理机构: Rabin & Berdo, P.C.
- 优先权: TW94101221A 20050114
- 主分类号: H03L5/00
- IPC分类号: H03L5/00
摘要:
A voltage controlled oscillator with anti supply voltage variation and/or process variation includes an oscillation circuit for outputting an oscillatory signal; a current source coupled to the oscillation circuit for providing an input current to the oscillation circuit; and a variation compensation circuit for compensating the variations generated by the supply voltage and process. The variation compensation circuit includes a peak detector for generating a peak voltage proportional to the amplitude of the oscillatory signal; a compensating voltage generator for generating a reference voltage according to the process variation so that the oscillation circuit achieves the same working conditions under the process variation; and a comparator for comparing the peak voltage and the reference voltage to generate a control voltage. When the variation compensation circuit includes an amplifier, the supply voltage can be compensated.