Analysis of a composite technique for optimum noise performance

A. J. Peyton PhD; Y. Abou-Fakher; B. Wilson

doi:10.1049/ip-cds:19941023

Analysis of a composite technique for optimum noise performance

A. J. Peyton PhD, Y. Abou-Fakher, B. Wilson

Research output: Contribution to journal › Article › peer-review

Abstract

A technique for combining two voltage operational amplifiers to create a single composite-voltage operational amplifier (VOA) is analyzed. The composite amplifier can be treated essentially as a single VOA which gives an optimum combination of the DC an AC performances of the two constituent amplifiers. Specific practical examples of the technique have been previously reported, but in this paper we present an analysis and establish the optimum combination conditions. To support the analysis a further example of the composite technique is presented in which a high-performance chopper stabilised VOA (MAX 430) is coupled with a low-noise bipolar VOA (OP 27). Measurements have shown that the composite device exhibits premium qualities from both OA, with low noise and very low input-offset voltage drift.

Original language	English
Pages (from-to)	210-214
Number of pages	4
Journal	IEE Proceedings: Circuits, Devices and Systems
Volume	141
Issue number	3
DOIs	https://doi.org/10.1049/ip-cds:19941023
Publication status	Published - Jun 1994

Keywords

feedback frequency response linear network analysis noise operational amplifiers

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abstract = "A technique for combining two voltage operational amplifiers to create a single composite-voltage operational amplifier (VOA) is analyzed. The composite amplifier can be treated essentially as a single VOA which gives an optimum combination of the DC an AC performances of the two constituent amplifiers. Specific practical examples of the technique have been previously reported, but in this paper we present an analysis and establish the optimum combination conditions. To support the analysis a further example of the composite technique is presented in which a high-performance chopper stabilised VOA (MAX 430) is coupled with a low-noise bipolar VOA (OP 27). Measurements have shown that the composite device exhibits premium qualities from both OA, with low noise and very low input-offset voltage drift.",

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T1 - Analysis of a composite technique for optimum noise performance

AU - Peyton PhD, A. J.

AU - Abou-Fakher, Y.

AU - Wilson, B.

PY - 1994/6

Y1 - 1994/6

N2 - A technique for combining two voltage operational amplifiers to create a single composite-voltage operational amplifier (VOA) is analyzed. The composite amplifier can be treated essentially as a single VOA which gives an optimum combination of the DC an AC performances of the two constituent amplifiers. Specific practical examples of the technique have been previously reported, but in this paper we present an analysis and establish the optimum combination conditions. To support the analysis a further example of the composite technique is presented in which a high-performance chopper stabilised VOA (MAX 430) is coupled with a low-noise bipolar VOA (OP 27). Measurements have shown that the composite device exhibits premium qualities from both OA, with low noise and very low input-offset voltage drift.

AB - A technique for combining two voltage operational amplifiers to create a single composite-voltage operational amplifier (VOA) is analyzed. The composite amplifier can be treated essentially as a single VOA which gives an optimum combination of the DC an AC performances of the two constituent amplifiers. Specific practical examples of the technique have been previously reported, but in this paper we present an analysis and establish the optimum combination conditions. To support the analysis a further example of the composite technique is presented in which a high-performance chopper stabilised VOA (MAX 430) is coupled with a low-noise bipolar VOA (OP 27). Measurements have shown that the composite device exhibits premium qualities from both OA, with low noise and very low input-offset voltage drift.

KW - feedback frequency response linear network analysis noise operational amplifiers

U2 - 10.1049/ip-cds:19941023

DO - 10.1049/ip-cds:19941023

M3 - Article

SN - 1350-2409

VL - 141

SP - 210

EP - 214

JO - IEE Proceedings: Circuits, Devices and Systems

JF - IEE Proceedings: Circuits, Devices and Systems

IS - 3

ER -

Analysis of a composite technique for optimum noise performance

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