A new design topology for low-voltage CMOS current feedback amplifiers

A new topology for designing low-voltage current feedback amplifiers (CFAs) is presented. By employing a second-generation positive current conveyor followed by an operational amplifier in an unconventional manner, the design circumvents the problem of trying to achieve large transimpedance in a low...

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Bibliographic Details
Published inIEEE transactions on circuits and systems. II, Express briefs Vol. 53; no. 1; pp. 34 - 38
Main Authors Maundy, B.J., Sarkar, A.R., Gift, S.J.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.01.2006
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Bandwidth
Circuits
CMOS
CMOS process
Current feedback amplifier (CFA)
Current feedback amplifiers
Design engineering
Feedback amplifiers
Gain
low-voltage operational amplifier
Manufacturing processes
Operational amplifiers
Power amplifiers
Resistors
Semiconductor device manufacture
Semiconductor optical amplifiers
Semiconductors
Topology
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Summary:A new topology for designing low-voltage current feedback amplifiers (CFAs) is presented. By employing a second-generation positive current conveyor followed by an operational amplifier in an unconventional manner, the design circumvents the problem of trying to achieve large transimpedance in a low-voltage environment. It is shown that this CFA configuration also results in near gain independent closed-loop bandwidth defined by a single feedback resistor. The proposed amplifier was verified experimentally by a chip designed using Taiwan Semiconductor Manufacturing Company's 0.18-mum digital CMOS process of a single-ended power supply of 1.8 V
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2005.855731