Patent ID: 9680482
Date: 2017-06-13
CPC Classifications: H03L

Claim:
1. A phase-locked loop device comprising: a phase frequency detector configured to receive an input signal and a first feedback signal and configured to generate a control signal set based on the input signal and the first feedback signal; a charge pump electrically connected to the phase frequency detector, wherein the charge pump comprises: a loop filter electrically connected to the charge pump, configured to receive a first current from the charge pump, and configured to generate a control voltage based on the first current, wherein the charge pump is configured to generate a second current based on the control signal set and a first copy of the control voltage and is configured to provide the second current to the loop filter, and wherein the second current is linearly related to the control voltage; a voltage-controlled oscillator electrically connected to the loop filter and configured to generate an output signal based on a second copy of the control voltage, wherein a frequency of the output signal is directly proportional to the control voltage; and a signal processor electrically connected to each of the voltage-controlled oscillator and the phase frequency detector, configured to generate a second feedback signal based on the output signal, and configured to provide the second feedback signal to the phase frequency detector.