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Symmetrical Class-AB OP-AMP with Improved GB Product

Author(s):

CH Lakshmana , D V R Dr. HS MIC college of Technology; M. Muzammil Parvez, D V R Dr. HS MIC college of Technology; Navya Sree. V, D V R Dr. HS MIC college of Technology

Keywords:

Cas-code Op-Amp, Class AB Op-Amp, GB Product, Slew Rate

Abstract

In this paper various class AB two-stage op-amps with high and approximately symmetrical slew rate and very simple architecture are introduced in this brief. A current replicating branch with scaled-down transistors in combination with adaptive loads is used to implement a push–pull output stage with maximum output current several times higher than the bias current. Simulation results show a 53.49% improvement in gain and 10 to 14 times improvement in GB besides achieving the symmetrical slew rate.

Other Details

Paper ID: IJSRDV4I40352
Published in: Volume : 4, Issue : 4
Publication Date: 01/07/2016
Page(s): 338-341

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