A DC offset and CMRR analysis in a CMOS 0.35µm operational transconductance amplifier using Pelgrom's area/accuracy tradeoff

Authors:
Juan Pablo Martinez Brito;Sergio Bampi
Affiliations:
PGMICRO-Graduate Program on Microelectronics, Federal University of Rio Grande do Sul, UFRGS, Postal Code 15064 Porto Alegre, Brazil;PGMICRO-Graduate Program on Microelectronics, Federal University of Rio Grande do Sul, UFRGS, Postal Code 15064 Porto Alegre, Brazil
Venue:
Microelectronics Journal
Year:
2009

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Abstract

Nonideal factors which play a key role in performance and yield in high-precision operational amplifiers are rigorously investigated. Expressions for the offset voltage (V"o"s) and the common-mode rejection ratio (CMRR) are derived and correlated. The mismatch accuracy is analyzed for different transistor geometries in a CMOS OTA (operational transconductance amplifier) in 0.35@mm technology by using the Monte Carlo approach.