Self-calibrating linear OTAs exemplified in a current mode ADC

Abstract

This paper summarizes different approaches for linear operational transconductance amplifiers (linear OTAs). A powerful technique for offset cancellation and transconductance calibration of linear OTAs is shown. The almost ideal linear OTAs can be used in different applications. We introduce the usage in current mode ADCs. Statistical simulations show that the ADC accomplishes 10 bits in a 0.35 /spl mu/m CMOS technology at a single supply voltage of 1.8 V.