A 1.5 V class AB output buffer

Author

You, Fan ; Embabi, S.H.K. ; Sinencio, E.S.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

fYear

1996

fDate

12-14 Aug 1996

Firstpage

285

Lastpage

288

Abstract

Most class AB push-pull output buffers have been developed for supply voltages ⩾3.0 V. Recently developed class AB buffers, which operate at a voltage supply lower than 3.0 V, use sophisticated feedback circuits to control the quiescent current. In this paper, a simple class AB buffer is proposed. It can be used at 1.5 V power supply and has the capability to drive small resistive loads (<100 Ω). The circuit has been fabricated using a 1.2 μ digital CMOS process. Experimental results demonstrate that the proposed circuit provides good control over the quiescent current. The standard deviation of the quiescent current is 17%. Combined with a floating gate input stage, a rail-to-rail input/output op amp has been fabricated and tested

Keywords

CMOS analogue integrated circuits; buffer circuits; differential amplifiers; operational amplifiers; 1.2 micron; 1.5 V; 100 ohm; class AB push-pull output buffer; digital CMOS process; floating gate; quiescent current control; rail-to-rail input/output op amp; resistive load; CMOS process; Circuit testing; Diodes; Feedback circuits; Feedback control; MOS devices; Power supplies; Rail to rail inputs; Resistors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Low Power Electronics and Design, 1996., International Symposium on

Conference_Location

Monterey, CA

Print_ISBN

0-7803-3571-6

Type

conf

DOI

10.1109/LPE.1996.547524

Filename

547524