Electronics Forum / CAD / October 2003

I have a transistor with it's Y parameters given.  I need to simulate
a circuit in spice using this transistor.
How do I model this BJT using its Y parameters in Spice?
Thanks

I have designed a astable multivibrator on breadboard with
transistors( npn , CEmitter config) and the gain is 10. powersupply =
dc 10v
when i designed the same circuit in spice , i am not seeing the

   I'm having a problem in my post processing feature using ORCAD.  When I
set up the Post Processing settings, I batch enable all the layers I want to
process.  All the layers are processed correctly (i.e. product output files)
with the exception of the silk screen layer.  For ...

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Hi NG,
I tried rotel DXP on a notebook.
unfortunately, the Dialogboxes, for example the "Browse libraries" Diaolog
is not readable, because the dialog box seems to be too small for alle the

I'm trying out LTSpice for the first time and was experiencing difficulty in generating a square pulse type input using the independent voltage source options.
What I wanted to do was have an input go from +15V after a few seconds to 0V with a very short fall time, then rise again ...

Just be curious if it's worthwhile to develpe a semiconductor switch
that will have inherent capability of soft transition so it could
be used similar as a regular switch but acheiving ZVS/ZCS.
Is that just a "day dreaming" theoratically? Or if it is practically

I'm looking to find the inductance values for the coils in a multisim
transformer.
Alright, I'm trying to simulate a simple diode modulator for a school
experiment and am stumped at simulating the IF can.

I inherited an old design that used Eagle for layout, and I want
to convert the parts libraries to either orcad or protel.
The parts are custom so they dont outside of these libraries.
Is there any tool that can convert them to something else or am I stuck

Hello,   I'm using Orcad 9.2 layout software. All the parts are laid out on
the board; however, when I attempt to manually route two pins together, the
entire screen turns blue (the color of the top layer which I'm using).  To
get out of this mode, I need to undo the route step and ...

Hi, there,
I am trying out the demo version of Protel DXP and was wondering if anyone
can give me step by step instructions on how to create new components in
Protel DXP. Here is the situation.

Anyone know of a print/view program for orcad DSN files?

Does anyone here knows how to measure the peak of a wave in LTSpice?
Thanks.

Thanks to Linear Technologies for making available such easy to use
and powerful freeware.  However I am having the following problem
modeling a crystal:
Using matlab I plotted the impedance of the crystal vs. frequency.

Hi, there:
I am looking for a decent software that enables me to draw digital waveforms
so that I can copy and paste into
my Word documents for documentation. Is there any sharewares out there?