voltage controlled oscillator PLL circuit clock generator and HDMI TX PHY

摘要

phase locked loop circuit includes a phase frequency detector, a first signal path, a second signal path, and a voltage controlled oscillator It includes. Phase / frequency detector is based on the phase difference and frequency difference between the reference signal and the output signal generates an up / down signal. The first signal path provides a first oscillator control signal proportional to the up / down signal. The second signal path provides a second oscillation control signal represented by the integral function of the up / down signal. Voltage controlled oscillator generates an output signal whose frequency is changed in response to the regulated voltage signal appearing at a constant combination of the first oscillation control signal and the second oscillation control signal by receiving the first oscillation control signal and the second oscillation control signal independently thereby.