A 1.5-V, Constant-Gm, Rail-to-Rail Input Stage Operational Amplifier

Author

Masoom, A. ; Hadidi, Kh

fYear

2006

fDate

10-13 Dec. 2006

Firstpage

632

Lastpage

635

Abstract

In this paper, a 1.5 V supply, rail-to-rail operational amplifier has been designed. Because of low voltage operation we have been made to use input differential pair in weak inversion mode and consequently low frequency response is natural. To obtain a gm-constant transconductor in first stage we use from a different structure that achieves smaller gm variation than previously defined circuits. A new CMFB circuit, also proposed, which is very efficient and suitable for low voltage operations. This opamp is designed in 0.35 mum CMOS process, and simulated in HSPICE.

Keywords

CMOS analogue integrated circuits; low-power electronics; operational amplifiers; CMFB circuit; CMOS process; HSPICE; frequency response; gm-constant transconductor; input differential pair; low voltage operation; rail-to-rail input stage operational amplifier; size 0.35 mum; voltage 1.5 V; weak inversion mode; Circuit synthesis; Electricity supply industry; Frequency response; Low voltage; Operational amplifiers; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Transconductance; Transconductors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2006. ICECS '06. 13th IEEE International Conference on

Conference_Location

Nice

Print_ISBN

1-4244-0395-2

Electronic_ISBN

1-4244-0395-2

Type

conf

DOI

10.1109/ICECS.2006.379868

Filename

4263446