A low-power, high-resolution WTA utilizing translinear-loop pre-amplifier

Author

Hsieh, Hung-Yi ; Tang, Kea-Tiong ; Tsai, Zen-Huan ; Chen, Hsin

fYear

2010

fDate

18-23 July 2010

Firstpage

1

Lastpage

5

Abstract

This paper proposes a low-power, high-resolution Winner-Take-All (WTA) circuit basing on transistors in subthreshold operation. The WTA adapts a tree structure to reduce the effect of process variations. In addition to the traditional way of using positive feedback to improve the comparison performance, we propose to use translinear loop to amplify the difference between two inputs before comparison to achieve high resolution. The circuit has been fabricated with TSMC 0.35μm 2P4M process. The WTA operates with input current as low as a few nano amperes and resolution as high as 0.1%. Measurement results show that the circuit has a non-negligible offset. Discussions on the source of the offset with a proposed solution are also given.

Keywords

low-power electronics; matrix convertors; preamplifiers; TSMC 2P4M process; high-resolution WTA; high-resolution Winner-Take-All circuit; low-power circuit; nonnegligible offset; positive feedback; size 0.35 mum; subthreshold operation; translinear-loop preamplifier; Fabrication;

fLanguage

English

Publisher

ieee

Conference_Titel

Neural Networks (IJCNN), The 2010 International Joint Conference on

Conference_Location

Barcelona

ISSN

1098-7576

Print_ISBN

978-1-4244-6916-1

Type

conf

DOI

10.1109/IJCNN.2010.5596547

Filename

5596547