A 0.5 μA offset-free current comparator for high precision current-mode signal processing

Chung-Yu Wu*, Chih Cheng Chen, Ming Kai Tsai, Chih Che Cho

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

A current-domain auto-zero technique and a fully differential current amplifier are developed to realize a offset-free current comparator. Simulation results show that the current comparator can receive a 0.5 μA input current in 1.3 μs even if the current amplifiers and the 1-V converter have offset currents of 20 μA. Its push-pull structure overcomes the slew-rate limiting problem and the fully differential configuration offers a high immunity to clock feedthrough noise and power supply variations.

Original languageEnglish
Pages (from-to)1829-1832
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Volume3
DOIs
StatePublished - 1 Dec 1991
Event1991 IEEE International Symposium on Circuits and Systems Part 4 (of 5) - Singapore, Singapore
Duration: 11 Jun 199114 Jun 1991

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