Design of CMOS OTAs for Low-Voltage and Low-Power Application

Hisashi TANAKA  Koichi TANNO  Hiroki TAMURA  Kenji MURAO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A    No.11    pp.3385-3388
Publication Date: 2008/11/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.11.3385
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Analog Signal Processing
weak inversion region,  OTA,  low-voltage,  low-power,  high-linearity,  

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In this letter, two OTAs with MOSFETs operating in the weak inversion region are proposed. One of the OTAs uses the exponential-logarithm transformation algorithm. Furthermore, the other realizes the high-linearity characteristics due to a small fluctuation of the common-terminal voltage of differential pair. The performance of the proposed OTAs was confirmed by HSPICE simulation.