Spice32 / Nutmeg32 for Windows NT - March release.
See the online help for registration information.


  Spice32 / Nutmeg32 is a general-purpose circuit simulation program for
nonlinear dc, nonlinear transient, and ac analyses.  Circuits may contain
resistors, capacitors, inductors, mutual inductors, independent voltage and
current sources, four types of dependent sources, lossless and lossy
transmission lines, two switches, uniform distributed RC lines, and the five
most common semiconductor devices: diodes, BJTs, JFETs, MESFETs, and MOSFETs.

  The Berkeley SPICE3 version is based directly on SPICE 2G.6.  While SPICE3
is being developed to include new features, it continues to support those
capabilities and models which remain in extensive use in the SPICE3 program.
SPICE3 has built-in models for the semiconductor devices, and the user need
specify only the per model parameter values.  The model for the BJT is based
on the integral-charge model of Gummel-Poon; however, if the Gummel-Poon
parameters are not specified, the model reduces to the simpler model.  In
either case, effects, ohmic resistance, and a output conductance may be
included.  The diode model can be used for either junction diodes or
Schottky barrier diodes.  The JFET model is based on the FET model of
Shichman and Hodges.  Six MOSFET models are implemented: MOS1 is described
by a square-law I-V characteristic, MOS2[1] is an analytical model, MOS3[1]
is a semi-empirical model; MOS6[2] is a simple analytic model, accurate in
the short channel region; MOS4[3,4] and MOS5[5] are the BSIM (Berkeley Short
-channel IGFET) and BSIM2.  MOS3, and MOS4 include second-order effects such
as channel length modulation, subthreshold scattering-limited velocity
saturation, small-size effects, and charge-controlled capacitances.

To Test:

1.  Run Nutmeg32.  Create a database fron the menu: File, create database.
    If you are running this under Windows 3.1, you'll have to do this step
    seperately by running Spice32.
2.  Load the binary data base from the menu: File, Load database... Select
    the file "diff.bin"
3.  From the Plot menu, type "v(3) v(5)"  You should see a plot of both of
    the transistor's collector waveforms.
4.  Try zooming on the plot with the mouse.  (Click-hold, drag, release)
5.  Zoom normal with a mouse right double click.
6.  Select ac analysis from the menu by: "Analysis, ac"
7.  Plot the frequency response with the plot menu with: "mag(v(3))"
    (Check the "xlog" button first.)
8.  Try plotting frequency response in decibels from the plot menu with:
    "db(v(3))"
9.  Test your own electronic crossover with the "xover.cir file"
    Follow the steps above, except transient analysis is not included.
    The output of the crossover is on nodes 4 and 9.  To plot try:
    "-3 db(v(4))-4.1 db(v(9))-4.1"
    (Check the xlog radio button below the plot command line)
    This will plot a reference line at -3 dB and plot the lowpass and
    highpass sections.  Because this crossover circuit has about 4.1 dB
    of gain, 4.1 is subtracted from from each plot to so that 0 dB is the
    reference.
    Pull down the AXIS, "Show Coordinates" menu to view cursor data.
10. Read on line help
11. Having problems?  Call me: Robert Zeff (209) 577-4268 x101, (209) 521-1448,
    Compuserve: 70323,1251, Fax (209) 577-8548

Please read the online help for additional operating instructions / 
registration, and example circuits.

Two example circuits, diff.sch and xover.sch are provided in Protel for Windows 
"Advanced Schematic" format.  
Spice netlists can be generated directly from Protel.  Diff.net & xover.net are
examples of these Protel Spice listings

Misc:
If there's a toolbar available under options, it's not of great use yet.
