Thevenin Impedance Networks for Spice Simulation Using Analog Behavioural Modelling

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Year : 2024 | Volume :14 | Issue : 03 | Page : 1-9
By
vector

K. Bharath kumar,

  1. Professor, Oki Electric company, Semiconductor Technology Lab,, Hachioji, Tokyo 193, Japan

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PSPICE /OrCAD software analog behavioural modelling (FREQ) option is used to obtain equivalent circuits for Thevenin equivalent resisitance to be used for three types of applications for various different circuits (other different networks with these Thevenin  models at DC),and Spice files are described   to  simulation circuits  with AC analyses. Three different applications useful in linear integrated circuits using DC thevenin resistance of two networks are considered. Firstly, the DC Thevenin resistance is converted to AC thevenin impedance with a complex multiplication factor using analog behavioural modelling of Pspice. This impedance is connected across required terminals of an electronic circuit and analysed. An impedance with value equal to complex ac voltage equivalent to AC thevenin equivalent is connected across the required terminals (with equiuvalent impedance=AC voltage/AC current) and verified. The current through this impedance is converted to desired AC voltage with a complex number and a third circuit is analysed with these modifications. Two SPICE files which are self-explainable are given with examples. The FREQ option, which was not previously available in SPICE 2G versions, is used to obtain Thevenin modifications for impedance and AC voltages. This Analog behavioural option can be used in polar or rectangular formation of complex numbers. The frequency dependent (independent) immittances can be simulated using this option. These two facilities are (could be) used in the examples described.

Keywords: Analog Passive Network Theory, Non- Linear circuits, Complex Variables, Circuit Analysis and Modelling, Solid state circuits, Microwave circuits, VLSI technology.

[This article belongs to Journal of VLSI Design Tools and Technology (jovdtt)]

How to cite this article:
K. Bharath kumar. Thevenin Impedance Networks for Spice Simulation Using Analog Behavioural Modelling. Journal of VLSI Design Tools and Technology. 2024; 14(03):1-9.
How to cite this URL:
K. Bharath kumar. Thevenin Impedance Networks for Spice Simulation Using Analog Behavioural Modelling. Journal of VLSI Design Tools and Technology. 2024; 14(03):1-9. Available from: https://journals.stmjournals.com/jovdtt/article=2024/view=0

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Regular Issue Subscription Review Article
Volume 14
Issue 03
Received 22/10/2024
Accepted 26/10/2024
Published 16/11/2024
249