Low Distortion Linear Voltage-to-Current Convertor Consisting of Twin MOSFET's Current Sources and Current Sinks Pair

Hajime TAKAKUBO  Ryo WATABE  Kawori TAKAKUBO 

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences  Vol.E86-A  No.4  pp.758-764
Publication Date: 2003/04/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section of Selected Papers from the 15th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
linear voltage-to-current convertor,  current subtractor,  channel length modulation,  low distortion OTA, 

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Summary: 
A linear voltage-to-current convertor without current mirror circuit is proposed for low distortion applications employing short channel MOSFET's. Twin current sources and current sinks pair of MOSFET's having the same drain-source voltage are employed for a substitute of the current mirror circuits, in order to eliminate the channel length modulation factor of the short channel MOSFET's. HSPICE simulation is shown in order to evaluate the proposed circuits. As an application, a low distortion OTA is realized by employing the proposed linear voltage-to-current convertor with short channel MOSFET's.