发明名称 |
PLL CIRCUIT AND SEMICONDUCTOR DEVICE HAVING THE SAME |
摘要 |
A PLL circuit includes a phase detector, a loop filter (LF), a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares a phase of a signal Fs which is input from outside with a phase of a signal Fo/N which is input from the frequency divider. The loop filter generates a signal Vin by removing alternating current components from a signal input from the phase detector. The voltage-controlled oscillator outputs a signal Fo based on the signal Vin input from the loop filter. The frequency divider converts the signal Fo output from the voltage-controlled oscillator into Fo/N (frequency division by N), and outputs it to the phase detector.
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申请公布号 |
WO2006118284(A1) |
申请公布日期 |
2006.11.09 |
申请号 |
WO2006JP309062 |
申请日期 |
2006.04.24 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD.;KOYAMA, JUN;OSADA, TAKESHI |
发明人 |
KOYAMA, JUN;OSADA, TAKESHI |
分类号 |
H03L7/099;H03K3/354 |
主分类号 |
H03L7/099 |
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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