Title :
Linear bipolar OTAs based on a triple-tail cell employing exponential circuits
Author :
Matsumoto, Fujihiko ; Noguchi, Yasuaki
Author_Institution :
Nat. Defense Acad., Kanagawa, Japan
Abstract :
Two types of new operational transconductance amplifiers (OTA), which are composed of exponential circuits and a triple-tail cell, are presented. The linear input voltage ranges of the proposed OTAs are wider than that of the triple-tail cell and have lower current consumption. The improvement of the signal-to-noise ratio is confirmed. The results of SPICE simulation show that the OTAs have good frequency responses. Monte Carlo simulation shows that the transconductance deviation of the proposed OTAs due to process variation is comparatively similar to that of the triple-tail cell.
Keywords :
Monte Carlo methods; SPICE; operational amplifiers; Monte Carlo simulation; SPICE simulation; exponential circuit; hyperbolic circuit; linear bipolar OTA; linear circuit; operational transconductance amplifier; signal-to-noise ratio; transconductance deviation; triple-tail cell; Circuits; Frequency response; Linearity; Operational amplifiers; Power dissipation; SPICE; Signal to noise ratio; Tail; Transconductance; Voltage; 65; Exponential circuit; OTA; hyperbolic circuit; linear circuit; operational transconductance amplifier; triple-tail cell;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2004.838331
