Class-AB large-swing CMOS buffer amplifier with controlled bias current

Author

Joongsik Kih ; Deog-Kyoon Jeong

Author_Institution

Dept. of Electron. Eng., Seoul Nat. Univ.

Volume

28

Issue

12

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

1350

Lastpage

1353

Abstract

A class-AB large swing CMOS buffer amplifier with new error amplifier circuits is presented. The error amplifier accurately controls the quiescent current through the output transistors, thereby reducing the variation of the quiescent power dissipation due to process and temperature variations. The buffer amplifier fabricated using 1.2-μm CMOS technology occupies an area of 103 mil² and dissipates an average of 4.7 mW under the quiescent condition with the standard deviation of only 3.2% of the average value. It has -63.6 dB THD with 3.5 V_pp output swing into a 300 Ω/150 pF load at 5 kHz

Keywords

CMOS integrated circuits; audio-frequency amplifiers; buffer circuits; differential amplifiers; linear integrated circuits; 1.2 micron; 1.2-μm CMOS technology; 4.7 mW; 5 kHz; THD; class-AB large swing CMOS buffer amplifier; controlled bias current; error amplifier circuits; output swing; quiescent current; quiescent power dissipation; standard deviation; CMOS technology; Circuits; Differential amplifiers; Error correction; MOSFETs; Power amplifiers; Power dissipation; Telephony; Temperature control; Voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.262009

Filename

262009