Design and Analysis of OTA Switched Current Mirrors

Takahiro INOUE  Oinyun PAN  Fumio UENO  Yoshito OHUCHI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A    No.6    pp.940-946
Publication Date: 1993/06/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 1992 Joint Technical Conference on Circuits/Systems,Computers and Communications (JTC-CSCC'92))
Category: Methods and Circuits for Signal Processing
electronic circuits,  integrated electronics,  analog signal processing,  switched current,  transconductance amplifier,  

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Switched-current (SI) is a current-mode analog sampled-data signal processing technique realizable in standard digital CMOS technologies. In this paper, new switched-current (SI) mirrors using OTAs (operational transconductance amplifiers) are proposed. These circuits are less sensitive to clock-feedthrough noise than conventional SI mirrors by virtue of linear I-V/V-I transformations. In addition, the current gain of the proposed mirror is electronically tunable. Not only inverting mirrors but also noninverting mirrors can be realized by this method.