Free class AB–AB Miller opamp with high current enhancement | Zendy

RomanLoera Alejandro | Zendy; RamirezAngulo Jaime | Zendy; LopezMartin Antonio | Zendy; Carvajal Ramon G. | Zendy

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Free class AB–AB Miller opamp with high current enhancement

Author(s) -

RomanLoera Alejandro,

RamirezAngulo Jaime,

LopezMartin Antonio,

Carvajal Ramon G.

Publication year - 2015

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2014.4064

Subject(s) - operational amplifier , current (fluid) , class (philosophy) , computer science , materials science , electrical engineering , electronic engineering , engineering , artificial intelligence , amplifier , cmos

A two‐stage (Miller) operational amplifier (opamp) with both class AB input and output stages is introduced. It has a well‐controlled quiescent current and generates dynamic output currents of up to a factor 45 times larger than the quiescent current. It uses very compact circuitry with small static power consumption in order to achieve class AB–AB operation and can operate with a low supply voltage. Experimental results of a test chip fabricated using 0.18 μm CMOS technology and simulations in 130, 90, 65 and 45 nm verify the proposed circuit.

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