Title :
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
fDate :
Nov. 29 2010-Dec. 1 2010
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);
Conference_Titel :
Power, Control and Embedded Systems (ICPCES), 2010 International Conference on
Conference_Location :
Allahabad
Print_ISBN :
978-1-4244-8543-7
DOI :
10.1109/ICPCES.2010.5698698
