The Super-Multi-Tanh Technique for Bipolar Linear Transconductance Amplifiers

Katsuji KIMURA

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E79-A    No.2    pp.190-198
Publication Date: 1996/02/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Analog Technologies in Submicron Era)
Category: 
Keyword: 
the multi-tanh technique,  the emitter area ratio unbalance technique,  the super-multi-tanh technique,  linear transconductance element,  OTA,  bipolar,  

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Summary: 
A novel circuit design technique for bipolar linear transconductance amplifiers is presented. A triple-tail cell, which consists of three emitter-common transistors biased by a single tail current, is exchangeable with an emitter-coupled pair in the multi-tanh cell, such as a multi-tanh doublet, a multi-tanh triplet or a multi-tanh quad. Therefore, the multi-tanh technique is further theoretically expanded to the super-multi-tanh technique. In this paper, the super-multi-tanh technique is proposed and discussed, and furthermore, a super-multi-tanh doublet is verified with bipolar transistor-arrays and discrete resistors on a breadboard.