A DTMOS-based 1 V opamp

Author

Achigui, H.F. ; Fayomi, C.J.B. ; Sawan, M.

Author_Institution

Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

1

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

252

Abstract

In this paper, we present a new opamp based on dynamic threshold voltage (DTMOS) transistors for low voltage applications (1 V). The opamp is a two stage configuration, with differential input pairs followed by a single ended class AB output. The input stage uses DTMOS devices for input common-mode range enhancement. The performed simulation shows a dc open loop gain of 64.4 dB, a phase margin of 64° and unity gain frequency of 35.7 MHz under a 10 kΩ and 5 pF load, using the 0.18 μm CMOS technology. The opamp has a CMRR of 84 dB, input and output swings of 0.7 V and 0.9 V respectively.

Keywords

CMOS analogue integrated circuits; VHF amplifiers; differential amplifiers; low-power electronics; operational amplifiers; 0.18 micron; 0.7 V; 0.9 V; 1 V; 10 kohm; 35.7 MHz; 5 pF; 64.4 dB; CMOS technology; DTMOS-based opamp; differential input pairs; dynamic threshold voltage transistors; input common-mode range enhancement; low voltage opamp; single ended class AB output; two stage configuration; CMOS technology; Circuits; Differential amplifiers; Laboratories; Low voltage; MOSFETs; Operational amplifiers; Performance gain; Power supplies; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on

Print_ISBN

0-7803-8163-7

Type

conf

DOI

10.1109/ICECS.2003.1302024

Filename

1302024