DocumentCode
2280227
Title
Implementation of a full digital amplifier using feedback quantization
Author
Hu, Jwu-Sheng ; Chen, Keng-Yuan
fYear
2006
fDate
14-16 June 2006
Abstract
An audio-band full digital amplifier is presented using a low-pass sigma-delta modulator. The modulator is a nonlinear feedback system which outputs a sequence to control the power MOSFET. By rigorous analysis of the stability and performance, an effective design method can be derived. This paper presents the modulator design using both 1- and 1.5-bit quantizer. The designs are successfully implemented by using an FPGA and other discrete elements. Experimental results and comparison are shown by driving the loudspeaker load
Keywords
audio-frequency amplifiers; circuit feedback; nonlinear systems; power MOSFET; power amplifiers; sigma-delta modulation; FPGA; digital amplifier; discrete elements; feedback quantization; loudspeaker; low-pass sigma-delta modulator; nonlinear feedback system; power MOSFET; Control systems; Delta-sigma modulation; Digital modulation; MOSFET circuits; Nonlinear control systems; Output feedback; Performance analysis; Power MOSFET; Quantization; Stability analysis;
fLanguage
English
Publisher
ieee
Conference_Titel
American Control Conference, 2006
Conference_Location
Minneapolis, MN
Print_ISBN
1-4244-0209-3
Electronic_ISBN
1-4244-0209-3
Type
conf
DOI
10.1109/ACC.2006.1656641
Filename
1656641
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