Title :
Low voltage fully differential CMOS current feedback operational amplifier
Author :
Mahmoud, Soliman A.
Author_Institution :
Dept. of Electron. & Commun. Eng., Cairo Univ., Fayoum, Egypt
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;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1353894
