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Phase-Locked Loop Circuit, Data Recovery Circuit, and Control Method for Phase-Locked Loop Circuit
Phase-Locked Loop Circuit, Data Recovery Circuit, and Control Method for Phase-Locked Loop Circuit
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机译:锁相环电路,数据恢复电路以及锁相环电路的控制方法
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摘要
A phase-locked loop circuit, which includes a phase frequency detector, a charge pump, a loop low-pass filter, a first voltage-current converter, a second voltage-current converter, a current-controlled oscillator, a frequency divider, a comparator, and a mode controller, where the mode controller is configured to control the switches S1, S2, and S3 included in the loop low-pass filter to connect or disconnect. Using the phase-locked loop circuit, a voltage value of a second control voltage signal VC2 provided for the first voltage-current converter can reach, in a relatively short time, a voltage value of a first control voltage signal VC1 provided for the second voltage-current converter, thereby increasing a speed of establishing the phase-locked loop circuit and implementing a quick response of the phase-locked loop circuit.
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