The Analysis and Simulation of Digital Power Amplifier Based on Midpoint Sampling Method

Author

Zhao Weiwei ; Yu Xianlun ; Chen Zhuo

Author_Institution

Coll. of Electron. & Inf. Eng., Chongqing Three Gorges Univ., Chongqing, China

fYear

2011

Firstpage

1

Lastpage

4

Abstract

Digital power amplifier is a will input analog audio signals or PCM digital information transform into PWM or PDM pulse signal, and then use the pulse signal PWM or PDM to control the power switch device links/broken audio power amplifier, also called switch amplifier. It has high efficiency, small volume, low distortion advantages. Digital power amplifier including pulse width modulation (PWM) and output level two parts. The traditional sampling processing operation is very complex and hardware realization cost is high, as well as difficult. This paper will analyze the midpoint sampling and give it a simulation. This algorithm does not have multiply and divide operations, only including addition and subtraction, greatly reduced the hardware consumption. It accords with today´s low cost and low power development trend.

Keywords

low-power electronics; power amplifiers; pulse width modulation; sampling methods; PCM digital information; PDM pulse signal; PWM pulse signal; analog audio signal; digital power amplifier; hardware consumption reduction; midpoint sampling method; power switch device; pulse width modulation pulse signal; sampling processing operation; switch amplifier; Educational institutions; Hardware; Power amplifiers; Power harmonic filters; Pulse width modulation; Sampling methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on

Conference_Location

Wuhan

ISSN

2161-9646

Print_ISBN

978-1-4244-6250-6

Type

conf

DOI

10.1109/wicom.2011.6040236

Filename

6040236