User Guide

Before you begin
xxx
New Model Editor interface The Model Editor
(formerly known as Parts) has been improved and
modernized for Release 9. It now provides a unified
application for editing models either in text form or by
modifying their specifications. The Model Editor now also
supports Darlington modeling.
EKV version 2.6 MOSFET model The EKV model is a
scalable and compact model built on fundamental
physical properties of the device. Use this model to design
low-voltage, low-current analog, and mixed analog-
digital circuits that use sub-micron technologies.
Version 2.6 models the following:
• geometrical and process related aspects of the device
(oxide thickness, junction depth, effective channel
length and width, and so on)
• effects of doping profile and substrate effects
• weak, moderate, and strong inversion behavior
• mobility effects due to vertical and lateral fields and
carrier velocity saturation
• short-channel effects such as channel-length
modulation, source and drain charge sharing, and the
reverse short channel effect
• thermal and flicker noise modeling
• short-distance geometry and bias-dependent device
matching for Monte Carlo analysis
Enhanced model libraries The model libraries
supplied with PSpice Release 9 have been enhanced to
include the latest models from various vendors, as well as
models for popular optocouplers, Darlingtons, and DAC
and ADC devices.
To
f
in
d
out more, see Creating and
editing models on page -85.
To
f
in
d
out more, re
f
er to MOSFET
d
evices
in the Analog Devices chapter of the
online OrCAD PSpice A/D
R
eference Manual.
Pspug.book Page xxx Wednesday, November 11, 1998 1:14 PM