IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
Low-voltage differential voltage follower for WTA and fully differential applications
Ivan Padilla-CantoyaPaul M. FurthJesus E. Molinar-SolisAlejandro Diaz-Sanchez
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JOURNALS FREE ACCESS

2012 Volume 9 Issue 6 Pages 491-495

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Abstract

A low-voltage differential version of a high performance voltage follower is presented. The proposed circuit is very compact, and symmetric with respect to the input devices. Both differential input devices are enhanced by local shunt feedback, increasing the gain and, thus, reducing the output resistance for higher precision. The circuit has proved useful as a winner-take-all (WTA) circuit. It also features operation as a fully differential amplifier with low supply voltage requirements close to a transistor's threshold voltage. Experimental results verifying the operation of the proposed structure are provided.

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© 2012 by The Institute of Electronics, Information and Communication Engineers
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