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

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3 Author(s)
Maundy, B.J. ; Dept. of Electr. & Comput. Eng., Univ. of Calgary ; Sarkar, A.R. ; Gift, S.J.

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

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:53 ,  Issue: 1 )

Date of Publication:

Jan. 2006

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