Class-AB rail-to-rail CMOS buffer with bulk-driven super source followers

Haga, Yasutaka and Kale, Izzet (2009) Class-AB rail-to-rail CMOS buffer with bulk-driven super source followers. In: Proceedings of the European Conference on Circuit Theory and Design, 23-27 August 2009, Antalya, Turkey (ECCTD 2009). IEEE, pp. 379-382. ISBN 9781424438969


Official URL: http://dx.doi.org/10.1109/ECCTD.2009.5275077


This paper describes a rail-to-rail CMOS analog voltage buffer designed to have extremely low static current consumption as well as high current drive capability. The buffer employs a complementary pair of super source followers, but a bulk-driven input device with the replica-biased scheme is utilized to eliminate the DC level shift, quasi-floating gate transistors to achieve class-AB performance, and a current switch which shifts between the complementary pair to allow rail-to-rail operation. The proposed buffer has been designed for a 0.35 mum CMOS technology to operate at a 1.8 V supply voltage. The simulated results are provided to demonstrate that the total harmonic distortion for a 1.6 Vpp 100 kHz sine wave with a 68 pF load is as low as -46 dB, whilst the static current consumption remains under 8 muA.

Item Type:Book Section
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:7423
Deposited On:29 Jan 2010 12:33
Last Modified:12 Aug 2010 10:09

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