Combiner-Based MOS OTAs

Koichi TANNO  Kenya KONDO  Okihiko ISHIZUKA  Takako TOYAMA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E88-A   No.6   pp.1622-1625
Publication Date: 2005/06/01
Online ISSN: 
DOI: 10.1093/ietfec/e88-a.6.1622
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Analog Signal Processing
Keyword: 
OTA,  operational transconductance amplifier,  combiner,  CMOS analog integrated circuits,  

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Summary: 
In this letter, two kinds of MOS operational transconductance amplifiers (OTAs) based on combiners are presented. Each OTA has the following advantages; one of the proposed OTAs (OTA-1) can be operated at low supply voltage and the other OTA (OTA-2) has wide bandwidth. Through HSPICE simulations with a standard 0.35 µm CMOS device parameters, the operation under the supply voltage of 1.5 V for OTA-1 and the -3 dB bandwidth of several gigahertz for OTA-2 are confirmed.