Title :
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
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;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6040236
