A comparative study of CMOS based current feedback topologies (CFAs) suitable for low voltage applications

Author

Singh, Rakesh Kumar ; Nagaria, R.K.

Author_Institution

Dept. of Electron. Eng., Kamla Nehru Inst. of Technol., Sultanpur, India

fYear

2010

fDate

Nov. 29 2010-Dec. 1 2010

Firstpage

1

Lastpage

6

Abstract

A comparative study of CMOS-CFA is presented in this paper. By employing a second-generation positive current conveyor cascaded with amplifier followed by a buffer the design circumvents the problem of large transimpedance and high output impedance in a low voltage environment. It is observed that the reported configuration also results the near gain independent closed loop BW controlled by single feedback resistor. The reported circuit is simulated using 180nm and 90nm CMOS process technology and performance comparison of CFA characteristics is measured. As an application of the topology, the characteristics of low pass and band pass filters are also verified.

Keywords

CMOS integrated circuits; amplifiers; band-pass filters; feedback; low-pass filters; resistors; CFA characteristics; CMOS based current feedback topologies; CMOS process technology; CMOS-CFA; amplifier; band pass filters; closed loop BW; comparative study; high output impedance; low pass filters; low voltage applications; low voltage environment; second-generation positive current conveyor; single feedback resistor; Band pass filters; Bandwidth; CMOS integrated circuits; Impedance; Radio frequency; Topology; Transistors; Buffer; CMOS-CFA; current conveyor; current feedback amplifier (CFA);

fLanguage

English

Publisher

ieee

Conference_Titel

Power, Control and Embedded Systems (ICPCES), 2010 International Conference on

Conference_Location

Allahabad

Print_ISBN

978-1-4244-8543-7

Type

conf

DOI

10.1109/ICPCES.2010.5698698

Filename

5698698