A galvanic isolation circuit and system, corresponding method

This disclosure relates to a kind of galvanic isolation circuit and system and corresponding operating method.Oscillator is coupled to the first side of galvanic electricity barrier device for providing it power supply signal.Oscillator is configured to be alternately conducted and turn off according to its applied PWM drive signal.The acceptor circuit for being coupled to galvanic electricity barrier device receives from it pwm power control signal.The signal reconstruction circuit being coupled between acceptor circuit chunking and oscillator provides the PWM drive signal reconstructed by pwm power control signal to oscillator.Signal reconstruction circuit includes being coupled to acceptor circuit chunking and being configured to be locked to the PLL circuit of the pwm control signal from acceptor circuit chunking.The circuit PLL in PLL circuit is sensitive for the PWM drive signal for being applied to oscillator.The configuration circuit PLL is disconnected using the result that turns off as power oscillators.