DocumentCode :
2607653
Title :
CMOS technology and current-feedback op-amps
Author :
Bruun, Erik
Author_Institution :
Electron. Inst., Tech. Univ. of Denmark, Lyngby, Denmark
fYear :
1993
fDate :
3-6 May 1993
Firstpage :
1062
Abstract :
Some of the problems related to the application of CMOS technology to current-feedback operational amplifiers (CFB op-amps) are identified. Problems caused by the low device transconductance and by the absence of matching between p-channel and n-channel transistors are examined, and circuit solutions providing improved input characteristics are presented. Problems related to the achievable output voltage swing are examined, and circuits which may be used to achieve a near rail to rail output swing are proposed. It is concluded that mere translations of bipolar circuit designs yield a rather poor performance compared to the bipolar designs, but CMOS has a potential for CFB op-amp design if more ingenious circuit configurations are applied
Keywords :
CMOS analogue integrated circuits; feedback amplifiers; integrated circuit design; operational amplifiers; CMOS technology; current-feedback op-amps; input characteristics; linear IC; op-amp design; operational amplifiers; output voltage swing; rail output swing; Bandwidth; CMOS technology; Circuits; Feedback loop; MOSFETs; Mirrors; Operational amplifiers; Output feedback; Threshold voltage; Transconductance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
Type :
conf
DOI :
10.1109/ISCAS.1993.393917
Filename :
393917
Link To Document :
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