Method, apparatus and system for reducing DC coupling capacitance at switching amplifier

摘要

The digital amplifier (300) includes a pulse width modulation signal generator (320) receiving an input signal (AI) and generating an amplified pulse width modulated signal, a filter (330) filtering the amplified pulse width modulated signal and providing the filtered amplified pulse width modulated signal to an input node of a load, and a reference voltage generator (340) providing a reference voltage (VR) to a reference node of the load to reduce a DC component of the filtered amplified pulse width modulated signal provided to the input node of the load.