Design of CMOS current-feedback op-amps based on 0.25µm technology

Author

Zhang, Yaowen ; Yang, Li

Author_Institution

Sch. of Comput. Sci., Southwest Pet. Univ., Chengdu, China

fYear

2011

fDate

27-29 June 2011

Firstpage

3156

Lastpage

3159

Abstract

This paper presents a new CMOS current-feedback operational amplifier based on the adoption of the MOS tube in order to improve slew-rate. The cascode circuit was used to decrease the influence of power supply. Resistance feedback was used in the output stage to improve its load driving capability. Simulation results of the CFOA using BSM3´s 0.25 um CMOS process parameters with PSPICE, result in a high slew-rate as well as bandwidth gain-independence. Circuit parameters show a: 92 dB open loop gain, 178 MHz unity gain bandwidth, 59 degree phase margin, 144 dB CMRR and power consumption around 0.246 mW from 0.75 V supply voltage.

Keywords

CMOS analogue integrated circuits; SPICE; operational amplifiers; BSM3 CMOS process parameters; MOS tube; PSPICE; bandwidth gain-independence; cascode circuit; current-feedback operational amplifier; load driving capability; resistance feedback; size 0.25 mum; voltage 0.75 V; CMOS integrated circuits; CMOS technology; Operational amplifiers; Resistance; SPICE; CFOA; High Gain; High slew-rate; Low voltage and low power;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Service System (CSSS), 2011 International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-9762-1

Type

conf

DOI

10.1109/CSSS.2011.5972164

Filename

5972164