Design and analysis of low-voltage current mode operational amplifier with differential-input and differential-output

Kuo Hsing Cheng, Huei Chi Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work, a new CMOS current operational amplifier (COA) with fully differential input and differential output is proposed and analysed. The amplifier is implemented from a differential current mirror input transimpedance stage followed by a differential output transconductance gain stage. A differential mode design technique is proposed and used in the feedback circuit. This configuration is the current mode counterpart of the traditional voltage operational amplifier (VOA). The simulation results of the new COA are based upon the 0.5μm CMOS process and ±1.5V supply voltage. The new COA exhibits an open-loop differential gain of 51.71dB with the gain-bandwidth product 314MHz and a settling time of 14ns. The design and optimization guidelines of the new COA have been developed and analysed so that they can be applied to the design of high-performance COA.

Original languageEnglish
Pages (from-to)443-453
Number of pages11
JournalInternational Journal of Electronics
Volume85
Issue number4
DOIs
StatePublished - Oct 1998

Fingerprint

Dive into the research topics of 'Design and analysis of low-voltage current mode operational amplifier with differential-input and differential-output'. Together they form a unique fingerprint.

Cite this