发明名称 |
VCO tuning curve compensated charge pump current synthesizer |
摘要 |
A system provided for controlling an output frequency of a voltage controlled oscillator relative to a reference frequency. A method includes the steps of detecting a phase error between a divided output of the voltage controlled oscillator and the reference frequency, pumping a frequency control input of the voltage controlled oscillator with the phase error and adjusting a pumping gain based upon a magnitude of the frequency control input to the voltage controlled oscillator.This apparatus includes a phase detector adapted to detect the phase error between the divided output of the voltage controlled oscilator and the reference frequency and a charge pump adapted to pump the frequency control input of the voltage controlled oscillator with the phase error. The apparatus also includes a gain controller adapted to adjust the pumping gain based upon the magnitude of the frequency control input to the voltage controlled oscillator.
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申请公布号 |
US6680653(B2) |
申请公布日期 |
2004.01.20 |
申请号 |
US20000742256 |
申请日期 |
2000.12.20 |
申请人 |
SKYWORKS SOLUTIONS, INC. |
发明人 |
GRIFFITH SCOTT A.;TRINH TRANG N.;GOOD PETE |
分类号 |
H03L7/089;H03L7/18;(IPC1-7):H03L7/00 |
主分类号 |
H03L7/089 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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