The Simulation of MOS Integrated Circuits Using SPICE2

Abstract

This report is addressed to all SPICE2 users involved in the design of MOS (Metal Oxide Semiconductor) IC's (Integrated circuits). The material contained herein serves as an addition to the SPICE2.G User's Guide. The device and model parameters documented refer to the SPICE2.G release versions from the University of California, Berkeley and obsolete the information contained in the "SPICE2 MOS Modeling Handbook" which is valid for the SPICE2.D release versions. The impact of MOS IC s in both analog and digital applications as well as the decreasing dimensions of the single transistors enabled by advances in processing have made it necessary to refine the models and to provide more information about each device as it appears on the circuit layout. Associated with each MOSFET is a drain and source-junction sidewall capacitance (which has a different voltage dependence than the bottom of the diffusion) and a parasitic series resistance. These are unique to a certain geometry. At the model level there are effects which become important as the channel length and width go below 10um. A thorough description of all parameters appearing on the element (device) card and model card is contained in Sec. 2. In SPICE2.G there are three different MOS models available to the user. The Level 1 model is the simple Shichman-Hodges model implemented according to Nagel s "SPICE2: A Computer Program to Simulate Semiconductor Circuits." This first order model has been found necessary for checking out the correctness of hand calculations when understanding or developing new circuits. The Level 2 model is an analytical one-dimensional model which incorporates most of the second-order effects of small-size devices. The Level 3 model is a semi-empirical model described by a set of parameters which are defined by curve-fitting rather than physical background.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1980
Accession Number
ADA606827

Entities

People

  • Andrei Vladimirescu
  • Sally Liu

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Capacitance
  • Circuits
  • Computer Programs
  • Computers
  • Curve Fitting
  • Electronics
  • Equations
  • Field Effect Transistors
  • Geometry
  • Integrated Circuits
  • Measurement
  • Metal Oxide Semiconductors
  • Metal-Oxide-Semiconductor Field-Effect Transistors
  • Semiconductors
  • Simulations
  • Solid State Electronics
  • Transistors

Readers

  • Computational Modeling and Simulation
  • Integrated Circuit Design and Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene