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oaioai:ojs.ijet.ise.pw.edu.pl:article/503

Design of a Class-D Audio Amplifier With Analog Volume Control for Mobile Applications

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Publication date
20 June 2016
Publisher
Electronics and Telecommunications Committee

Abstract

A class-D audio amplifier with analog volume control (AVC) section and driver section for wireless and portable applications is proposed in this paper. The analog volume control section, including an integrator, an analog MUX, and a programmable gain amplifier (PGA) is implemented with three analog inputs (Audio, Voice, FM). For driver section, including a ramp generator, a comparator, a level shifter and a gate driver is designed to obtain a low distortion and a highefficiency. Designed with 0.18 um 1P6M CMOS technology, the class-D audio amplifier with analog volume control achieves a total root-mean-square (RMS) output power of 0.5W, a total harmonic distortion plus noise (THD+N) at the 8-Ω load less than 0.06%, and a power efficiency of 89.9% with a total area of 1.74mm2

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International Journal of Electronics and Telecommunications (Warsaw University of Technology)

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Last time updated on 30/10/2019

This paper was published in International Journal of Electronics and Telecommunications (Warsaw University of Technology).

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