NDLI: Admittance Matrix Models for the Nullor Using Limit Variables and Their Application to Circuit Design

Content Provider	IEEE Xplore Digital Library
Author	Haigh, D.G. Radmore, P.M.
Copyright Year	2004
Abstract	A framework for symbolic analysis and synthesis of linear active circuits has previously been proposed which is based on the use of admittance matrices and infinity-variables. The notation has the important advantage that it can describe both ideal circuit elements, for which an infinite limit is implied, and nonideal circuit elements for which matrix elements are considered finite. The nullor is a very important circuit element because it can represent the ideal operational amplifier and the ideal transistor. For the nonideal case, the use of finite matrix elements implies that the operational amplifier and transistor are both modelled as a voltage-controlled current source, which is fine if the transistor is a field effect transistor or if the operational amplifier is of the transconductance type, but not otherwise. The purpose of this paper is to apply the infin-variable framework in order to derive alternative models for the nullor that can be used to model voltage, current and transresistance operational amplifiers and bipolar junction transistors. We also show that the infin-variable description of an ideal transistor can include a factor to represent transistor geometry
Sponsorship	IEEE Circuits and Systems Society
Starting Page	2214
Ending Page	2223
Page Count	10
File Size	447127
File Format	PDF
ISSN	15498328
Volume Number	53
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Admittance Circuit synthesis Operational amplifiers Matrix converters Voltage H infinity control FETs Equations Active circuits Transconductance transistor admittance matrix circuit modelling nullor operational amplifier
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

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