A Realization of a Low-Voltage Differential-Output OTA Using a Simple CM Amplifier

Fujihiko MATSUMOTO  Yasuaki NOGUCHI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E81-A   No.2   pp.261-264
Publication Date: 1998/02/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Analog Circuit Techniques in the Digital-Oriented Era)
low-voltage,  OTA,  common-mode feedback,  common-mode gain,  differential-mode gain,  

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A technique for realization of low-voltage OTAs is presented in this letter. A very low-voltage differential-output OTA is realized by employing a new common-mode amplifier in the common-mode feedback circuit. The results of PSpice simulations are shown. The proposed OTA can operate at a 0. 9 V supply voltage.