ISOLATED PWM POWER AMPLIFIER

摘要

PROBLEM TO BE SOLVED: To provide a PWM power amplifier having an output isolated from a power source without using a large low frequency transformer and without having a switching circuit for power source to operate independently of an original power amplifier circuit. SOLUTION: A switching circuit is connected to the primary side and secondary side of a high frequency transformer to make the switching frequency on the primary and secondary sides equal, the conductivity rate constant and to change the phase difference corresponding to an input signal. Thus, a pulse width controlled output is obtained on the secondary side.