Title :
A new high-frequency very low output-impedance CMOS buffer
Author :
Manetakis, Kostas ; Toumazou, Chris
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
A technique to increase the transconductance of the MOS transistor by employing current feedback is presented and applied to the design of a voltage follower. Simulation results show that the output impedance of the buffer is kept very low over a wide range of frequencies while the input impedance remains very high. At the same time this buffer configuration shows wide bandwidth of operation, ability to drive large capacitive loads without oscillation and with very good linearity. Finally an example of a CFOA (current feedback op amp) using this buffer is presented
Keywords :
CMOS analogue integrated circuits; buffer circuits; circuit feedback; electric impedance; CMOS buffer; MOS transistor; current feedback op amp; high-frequency buffer; low output-impedance buffer; transconductance; voltage follower; wideband operation; Bipolar transistor circuits; Bipolar transistors; CMOS technology; Impedance; MOSFETs; Mirrors; Operational amplifiers; Output feedback; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.539990
