High-fidelity and high-efficiency analog amplifier combined with digital amplifier

Abstract

This invention provides an analog audio amplifier having both excellent linearity and high efficiency, which is combined with digital amplifier. The analog-digital combined amplifier comprises a class A, class B or class AB type analog amplifier serving as an independent voltage source; and a class D type digital amplifier serving as a dependent current source in which the analog amplifier and the digital amplifier are connected to each other.