Design and analysis of a micropower low-voltage bang-bang control class D amplifier

Author

Ge, Tong ; Tan, Meng Tong ; Chang, Joseph S.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

fYear

2005

fDate

23-26 May 2005

Firstpage

224

Abstract

We describe the design of a novel bang-bang control class D amplifier for low-voltage power-critical applications, including hearing instruments (hearing aids). We analyze the design parameters for the amplifier and determine the relationships between these parameters. The relationships derived herein provide good insight to the design of the amplifier to meet a given specification. We verify our theoretical analyses of some of the design parameters by comparing them against computer simulations. We also show that our bang-bang control class D amplifier features micropower dissipation, low harmonic non-linearities and is suitable for hearing instruments.

Keywords

CMOS analogue integrated circuits; bang-bang control; feedback amplifiers; harmonic distortion; hearing aids; low-power electronics; CMOS; bang-bang control class D amplifier; current sensing feedback loop; harmonic distortion; hearing aids; hearing instruments; low harmonic nonlinearities; micropower dissipation; micropower low-voltage amplifier; power-critical applications; Auditory system; Bang-bang control; Design engineering; Hardware; Hearing aids; High power amplifiers; Hysteresis; Instruments; Pulse amplifiers; Pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464565

Filename

1464565