Pulse width modulation circuit to generate a feedback stroke

Abstract

A device may include a reference divider circuit to divide a reference clock, a phase-frequency detector circuit to detect a detected phase difference and a detected frequency difference based on the reference divider output and a feedback clock, a loop filter circuit to filter the detector output, a voltage-controlled oscillator (VCO) control output pin coupled to the loop filter output, a VCO clock divider control output pin to select a divider of an external clock divider circuit, a divided VCO clock input pin to couple to an output of the external clock divider circuit, a pulse-width modulation (PWM) circuit having a PWM clock input coupled to the divided VCO clock input pin, and a period register to store a period value.a duty cycle register for storing a duty cycle value and a pulse-width modulated output based on the period value and the duty cycle value.