Design of Class D Amplifiers Using Zero Crossing Auto Gain Control-Reference-Cited by-同舟云学术

Design of Class D Amplifiers Using Zero Crossing Auto Gain Control

Published:2012-09 Issue: Volume:198-199 Page:1157-1161
ISSN:1662-7482
Container-title:Applied Mechanics and Materials
language:
Short-container-title:AMM

Author:

Wang Hai Shi¹,Zhang Bo²,Sun Jiang²

Affiliation:

1. University of Electronic Science and Technology of China

2. University of Electronic Science and Technology of China (UESTC)

Abstract

This paper proposes a method to control the gain of an amplifier. A 6-bit digital signal is used to control the gain of the amplifier by adjusting the resistance of a potentiometer. The change of the digital signal is allowed to change the gain of the amplifier only if the input signal of the amplifier crosses alternating current (AC) zero. The gain of the amplifier could be reduced or restored, which is based on whether the output signal of the amplifier exceeds a predetermined value or not. The method is verified in a class D amplifier. Road test shows that the method may eliminate the glitch caused by gain change, and the clamp caused by a too large gain.

Publisher

Trans Tech Publications, Ltd.

Link

https://www.scientific.net/AMM.198-199.1157.pdf

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