Patent ID: 6794932
Filing Date: 2004-09-21
Classification: H03F

Abstract:
A method of providing electrical isolation within a Class-D switching amplifier, wherein the amplifier includes an output stage having a first input and a second input, the method comprising the steps of:(a) generating a first pulse width modulated signal and a second pulse width modulated signal; (b) optoisolating the first pulse width modulated signal; (c) optoisolating the second pulse width modulated signal; (d) inverting the first pulse width modulated signal to provide a third pulse width modulated signal; (e) inverting the second pulse width modulated signal to provide a fourth pulse width modulated signal; (f) using the first pulse width modulated signal and the third pulse width modulated signal to drive the first input of the output stage; and (g) using the second pulse width modulated signal and the fourth pulse width modulated signal to drive the second input of the output stage.