System analysis of an optimal noise shaped quantizer for audio-band digital amplifier

Author

Jwusheng, Hu ; Kengyuan, Chen

Author_Institution

Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu

fYear

2008

fDate

16-18 July 2008

Firstpage

141

Lastpage

145

Abstract

This paper reports a novel application of receding finite horizon constrained optimization techniques to design an audio-band full digital amplifier. The digital amplifier using power MOSFET requires a modulator to modulate the reference signal into binary sequences. The modulator can be viewed as an over-sampled quantizer with noise-shaping requirement. The quantization scheme resulting from the optimization is derived in detail to arrive at the stability condition under zero initial conditions. Simulations as well as experimental results are given to illustrate the effectiveness of the design methodology.

Keywords

MOSFET; audio-frequency amplifiers; binary sequences; optimisation; audio-band digital amplifier; binary sequences; optimal noise shaped quantizer; power MOSFET; receding finite horizon constrained optimization techniques; system analysis; Binary sequences; Constraint optimization; Design optimization; Digital modulation; MOSFET circuits; Noise shaping; Power MOSFET; Power amplifiers; Quantization; Stability; Amplifiers; Digital filter structures; Modulation; Quantization noise; Quantizers; Receding horizon quadratic optimal control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference, 2008. CCC 2008. 27th Chinese

Conference_Location

Kunming

Print_ISBN

978-7-900719-70-6

Electronic_ISBN

978-7-900719-70-6

Type

conf

DOI

10.1109/CHICC.2008.4605687

Filename

4605687