A low noise class-AB operational amplifier with noise optimization technique

This paper presents a low noise operational amplifier with noise optimization and reduction techniques. It consists of a folded-cascode amplifier and a class-AB output stage with a simple minimum selector. The input-referred noise of an input transistor can be optimized through utilization of the re...

Full description

Saved in:

Bibliographic Details
Published in:	2014 International SoC Design Conference (ISOCC) pp. 96 - 97
Main Authors:	Seungheun Song, Kwanseok Jung, Subin Kim, Joongho Choi
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-11-2014
Subjects:	class-ab amplifier input referred noise low noise technique Noise operational amplifier
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	This paper presents a low noise operational amplifier with noise optimization and reduction techniques. It consists of a folded-cascode amplifier and a class-AB output stage with a simple minimum selector. The input-referred noise of an input transistor can be optimized through utilization of the relationship between input parasitic capacitance and flicker noise. The other main noise sources in a folded-cascode amplifier are reduced by increasing the size, adding resistors or by stacking FETs at the cascade biasing circuitry. The proposed amplifier is implemented in a 0.18-μm CMOS process.
DOI:	10.1109/ISOCC.2014.7087548