PWM modulator

摘要

A method is for reducing pulse skipping from a characteristic affecting a modulating signal input to an integrator of a pulse width modulation (PWM) modulator, together with a square wave carrier signal for generating a triangular waveform of the PWM modulator. The method may include creating a broad synchronous peak at vertexes of the triangular waveform output by the integrator.

主权项

1. A pulse width modulation (PWM) modulator comprising:
an integrator configured to
receive a modulating signal and a square wave carrier signal,PWM modulate the modulating signal with the square wave carrier signal, the square wave carrier signal having a frequency greater than a frequency of the modulating signal, andoutput a triangular waveform; a comparator configured to compare the triangular waveform with a fixed threshold, and output a PWM modulated square wave carrier signal; a first circuit configured to generate an auxiliary clock signal having a phase lead with respect to a clock signal associated with the square wave carrier signal; and a second circuit downstream from said first circuit and configured to
generate a derivative signal of the auxiliary clock signal, andinject the derivative signal into said integrator, said second circuit comprising a logic gate.