Low voltage fully differential CMOS current feedback operational amplifier

Author

Mahmoud, Soliman A.

Author_Institution

Dept. of Electron. & Commun. Eng., Cairo Univ., Fayoum, Egypt

Volume

1

fYear

2004

fDate

25-28 July 2004

Abstract

This paper presents a new CMOS fully differential current feedback operational amplifier (FDCFOA). The proposed CMOS realization of the FDCFOA is based on a novel class AB fully differential buffer circuit. Besides the proposed FDCFOA circuit is operating at supply voltages of ±1.5 V, it has a total standby current of 400 μA. The applications of the FDCFOA to realize variable gain amplifier, fully differential integrator, and fourth order fully differential maximally flat low pass filter are given. The fourth order filter provides 8 dB gain and a bandwidth of 4.3 MHz to accommodate the wideband CDMA standard. The proposed FDCFOA and its applications are simulated using CMOS 0.35 μm technology.

Keywords

CMOS integrated circuits; SPICE; buffer circuits; circuit simulation; code division multiple access; differential amplifiers; feedback amplifiers; low-pass filters; low-power electronics; operational amplifiers; wideband amplifiers; 0.35 micron; 1.5 V; 4.3 MHz; 400 muA; 8 dB; CMOS fully differential amplifier; CMOS technology; SPICE simulation; class AB fully differential buffer circuit; current feedback operational amplifier; fourth order low pass filter; fully differential integrator; fully differential maximally flat low pass filter; low voltage operational amplifier; variable gain amplifier; wideband CDMA standard; Band pass filters; Broadband amplifiers; CMOS technology; Circuits; Differential amplifiers; Feedback; Gain; Low pass filters; Low voltage; Operational amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on

Print_ISBN

0-7803-8346-X

Type

conf

DOI

10.1109/MWSCAS.2004.1353894

Filename

1353894