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Active and Passive Electronic Components
Volume 2008, Article ID 623970, 5 pages
Research Article

A New Translinear-Based Dual-Output Square-Rooting Circuit

Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand

Received 25 June 2008; Accepted 30 September 2008

Academic Editor: Krishnamachar Prasad

Copyright © 2008 Montree Kumngern and Kobchai Dejhan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new wide input range square-rooting circuit is presented. The proposed circuit consists of a dual translinear loop, an absolute value circuit, and current mirrors. A current-mode technique is used to provide wide input range with simple circuitry. The output signal of the proposed circuit is the current which is proportional to the square root of input current. The proposed square-rooting circuit was confirmed by using PSpice simulator program. The simulation results demonstrate that the proposed circuit provides the excellent temperature stability with wide input current range.