Low-Voltage Linear Bipolar OTAs Employing Hyperbolic Circuits with an Intermediate Voltage Terminal

Fujihiko MATSUMOTO  Hiroki WASAKI  Yasuaki NOGUCHI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E85-A   No.6   pp.1200-1208
Publication Date: 2002/06/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 2001 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2001))
operational transconductance amplifiers (OTAs),  linear circuits,  low-voltage circuits,  analog integrated circuits,  

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This paper proposes design of new linear bipolar OTAs using hyperbolic circuits with an intermediate voltage terminal. Four types of the OTAs are presented; two OTAs contain a hyperbolic sine circuit and the other two OTAs employ a hyperbolic cosine circuit. The linear input voltage range of the proposed OTAs is wider than that of the well-known conventional OTA, multi-TANH doublet, while each proposed OTA has advantages, such as low power dissipation, high-frequency characteristics and so on. The results of SPICE simulation show that satisfactory characteristics are obtained.