A Power‐Efficient CMOS Adaptive Biasing Operational Transconductance Amplifier. Issue 2 (1st April 2013)

• Record Type: Journal Article
• Authors: Torfifard, Jafar; A'ain, Abu Khari Bin
• Is Part Of: ETRI journal. Volume 35:Issue 2(2013)
• Page Start: 226
• Page End: 233
• Publication Date: 2013-04-01
• Subjects: Adaptive biasing -- CMOS operational transconductance amplifier (OTA) -- class‐AB amplifiers -- low power -- low voltage; Telecommunication -- Periodicals; Electronics -- Periodicals; Electronics; Telecommunication; Periodicals; Periodicals; 621.38205
• DOI: 10.4218/etrij.13.0112.0300
• Languages: English
• ISSNs: 1225-6463

Abstract

Abstract : This paper presents a two‐stage power‐efficient class‐AB operational transconductance amplifier (OTA) based on an adaptive biasing circuit suited to low‐power dissipation and low‐voltage operation. The OTA shows significant improvements in driving capability and power dissipation owing to the novel adaptive biasing circuit. The OTA dissipates only 0.4 μW from a supply voltage of ±0.6 V and exhibits excellent high driving, which results in a slew rate improvement of more than 250 times that of the conventional class‐AB amplifier. The design is fabricated using 0.18‐μm CMOS technology.