A high-bandwidth high-swing CMOS power amplifier for portable audio players

Author

Chan, P.K. ; Tao, J.C.

Author_Institution

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

Volume

1

fYear

2002

fDate

6/24/1905 12:00:00 AM

Abstract

A class-AB CMOS power amplifier, which embodies new error amplifiers and adopts the embedded frequency compensation in a multistage topology, is presented. The simulated result has shown that the unity gain-bandwidth is 7.3 MHz. The quiescent supply current is 1.43 mA whilst the output stage delivers maximum 40 mA into a 32 Ω // 220 pF load. The amplifier exhibits -83 dB THD at a closed-loop gain of 20 dB for 1 kHz, 2 Vpp output at a 3 V supply in a 0.6 μm CMOS technology.

Keywords

CMOS analogue integrated circuits; audio-frequency amplifiers; feedback amplifiers; power amplifiers; 0.6 micron; 1 kHz; 1.43 mA; 20 dB; 220 pF; 3 V; 40 mA; 7.3 MHz; CMOS power amplifier; CMOS technology; class-AB power amplifier; closed-loop gain; embedded frequency compensation; error amplifiers; high-bandwidth high-swing amplifier; multistage topology; output stage; portable audio players; quiescent supply current; unity gain-bandwidth; Bandwidth; Broadband amplifiers; CMOS technology; Consumer electronics; Costs; Differential amplifiers; Frequency; High power amplifiers; Power amplifiers; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1009837

Filename

1009837