Journal
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
Volume 47, Issue 8, Pages 1199-1210Publisher
WILEY
DOI: 10.1002/cta.2650
Keywords
analog integrated circuits; class AB circuits; CMOS integrated circuits; current amplifiers; current followers
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Funding
- AEI/FEDER [TEC2016-80396-C2-1-R]
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The design of a micropower class AB operational transconductance amplifier with large dynamic current to quiescent current ratio is addressed. It is based on a compact and power-efficient adaptive biasing circuit and a class AB current follower using the quasi-floating gate (QFG) technique. The amplifier has been designed and fabricated in a 0.5-mu m CMOS process. Simulation and measurement results show a slew rate (SR) improvement factor versus the class A version larger than 4 for the same supply voltage and bias currents, as well as enhanced small-signal performance.
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