BALANCED OUTPUT TYPED D-CLASS DIGITAL AMPLIFIER OF SYNCHRONIZING BETWEEN PWM WAVE FORM FOR + OUTPUT AND PWM WAVE FORM FOR - OUTPUT

摘要

PURPOSE: A class D digital amplifier is provided to minimize stress to power by inputting two signals into a reverse phase form. CONSTITUTION: A differential feedback part(300) generates a differential PWM feedback signal. A first integrator(302) integrates the differential PWM feedback signal. An adder(304) adds an output from the first integrator and an analog input signal. A second integrator(306) integrates an output from the adder. A comparator(308) generates a PWM signal by comparing an output from the second integrator with a predetermined level. A buffer(310) outputs a positive PWM signal by buffering the PWM signal. An inverter(312) outputs a negative PWM signal by reversing the PWM signal.