Design of low voltage low power CMOS OP-AMPS with rail-to-rail input/output swing

Author

Gopalaiah, S.V. ; Shivaprasad, A.P. ; Panigrahi, Sukanta K.

Author_Institution

Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India

fYear

2004

fDate

2004

Firstpage

57

Lastpage

61

Abstract

A novel input and output biasing circuit to extend the input common mode (CM) voltage range and the output swing to rail-to-rail in a low voltage op-amp in standard CMOS technology is presented. The input biasing circuit uses a Switched Capacitor Based Attenuator (SCBA) approach to establish rail-to-rail common mode input voltage range. And the output biasing circuit uses an Output Driver (OD), with floating bias to give the rail-to-rail swing at output stage. Three different OD schemes in operational amplifier have been proposed and tested the performance with SCBA. The simulation results justify the theoretical analysis.

Keywords

CMOS integrated circuits; attenuators; driver circuits; integrated circuit technology; low-power electronics; operational amplifiers; switched capacitor networks; CMOS technology; complementary metal oxide semiconductor design; floating bias; input biasing circuit; input common mode voltage range; low voltage low power CMOS OP-AMPS design; operational amplifiers design; output biasing circuit; output driver; rail-to-rail common mode input voltage range; rail-to-rail input/output swing; switched capacitor based attenuator; Attenuators; CMOS technology; Circuit testing; Driver circuits; Low voltage; Operational amplifiers; Rail to rail inputs; Rail to rail outputs; Switched capacitor circuits; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, 2004. Proceedings. 17th International Conference on

Print_ISBN

0-7695-2072-3

Type

conf

DOI

10.1109/ICVD.2004.1260903

Filename

1260903