On Dynamic Range Limitations of CMOS Current Conveyors

Erik Bruun

doi:10.1109/ISCAS.1999.780698

On Dynamic Range Limitations of CMOS Current Conveyors

Erik Bruun

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Abstract

This paper is concerned with the dynamic range of continuous time CMOS current mode circuits. As a representative current mode device a class AB current conveyor is examined. First, the voltage input range of the high impedance Y input is investigated. Next, the current input range of the low impedance X input is investigated. It is compared to the thermal noise in the X to Z signal path in order to evaluate the dynamic range, and the dependencies of the dynamic range on the supply voltage and the transistor lay-out is derived, both for the situation where the conveyor is used over a narrow frequency band and for the situation where the conveyor is used over the full bandwidth achievable. Finally, the optimisation of the current input range is related to the distortion characteristics and it is pointed out that to a first order approximation the distortion is independent of the current range.

Original language	English
Title of host publication	Proc. IEEE International Symposium on Circuits and Systems, vol. 2
Place of Publication	Piscataway
Publisher	IEEE
Publication date	1999
Pages	270-273
ISBN (Print)	0-7803-5471-0
DOIs	https://doi.org/10.1109/ISCAS.1999.780698
Publication status	Published - 1999
Event	1999 IEEE International Symposium on Circuits and Systems - Orlando, FL, United States Duration: 30 May 1999 → 2 Jun 1999 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6311

Conference

Conference	1999 IEEE International Symposium on Circuits and Systems
Country/Territory	United States
City	Orlando, FL
Period	30/05/1999 → 02/06/1999
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6311

Bibliographical note

Copyright 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

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title = "On Dynamic Range Limitations of CMOS Current Conveyors",

abstract = "This paper is concerned with the dynamic range of continuous time CMOS current mode circuits. As a representative current mode device a class AB current conveyor is examined. First, the voltage input range of the high impedance Y input is investigated. Next, the current input range of the low impedance X input is investigated. It is compared to the thermal noise in the X to Z signal path in order to evaluate the dynamic range, and the dependencies of the dynamic range on the supply voltage and the transistor lay-out is derived, both for the situation where the conveyor is used over a narrow frequency band and for the situation where the conveyor is used over the full bandwidth achievable. Finally, the optimisation of the current input range is related to the distortion characteristics and it is pointed out that to a first order approximation the distortion is independent of the current range.",

author = "Erik Bruun",

note = "Copyright 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.; 1999 IEEE International Symposium on Circuits and Systems ; Conference date: 30-05-1999 Through 02-06-1999",

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doi = "10.1109/ISCAS.1999.780698",

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N1 - Copyright 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

PY - 1999

Y1 - 1999

N2 - This paper is concerned with the dynamic range of continuous time CMOS current mode circuits. As a representative current mode device a class AB current conveyor is examined. First, the voltage input range of the high impedance Y input is investigated. Next, the current input range of the low impedance X input is investigated. It is compared to the thermal noise in the X to Z signal path in order to evaluate the dynamic range, and the dependencies of the dynamic range on the supply voltage and the transistor lay-out is derived, both for the situation where the conveyor is used over a narrow frequency band and for the situation where the conveyor is used over the full bandwidth achievable. Finally, the optimisation of the current input range is related to the distortion characteristics and it is pointed out that to a first order approximation the distortion is independent of the current range.

AB - This paper is concerned with the dynamic range of continuous time CMOS current mode circuits. As a representative current mode device a class AB current conveyor is examined. First, the voltage input range of the high impedance Y input is investigated. Next, the current input range of the low impedance X input is investigated. It is compared to the thermal noise in the X to Z signal path in order to evaluate the dynamic range, and the dependencies of the dynamic range on the supply voltage and the transistor lay-out is derived, both for the situation where the conveyor is used over a narrow frequency band and for the situation where the conveyor is used over the full bandwidth achievable. Finally, the optimisation of the current input range is related to the distortion characteristics and it is pointed out that to a first order approximation the distortion is independent of the current range.

U2 - 10.1109/ISCAS.1999.780698

DO - 10.1109/ISCAS.1999.780698

M3 - Article in proceedings

SN - 0-7803-5471-0

SP - 270

EP - 273

BT - Proc. IEEE International Symposium on Circuits and Systems, vol. 2

PB - IEEE

CY - Piscataway

T2 - 1999 IEEE International Symposium on Circuits and Systems

Y2 - 30 May 1999 through 2 June 1999

ER -

On Dynamic Range Limitations of CMOS Current Conveyors

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