[email protected] schrieb am 17.09.02 13:23:47:
Ashlock,William wrote:
>There are two great workbooks on Psice simulations by Roy W. Goody. The
>Title for both is 'MicroSim Pspice for Windows', copyright date 1998. Volume
>II is the one that covers oscillators. Check this tile on the various Web
>sites for used books and you might find a real bargain.
>
>
James Moritz wrote:
> Try connecting a pulsed voltage source (VPULSE) in series with the
> tank circuit - set it to generate a pulse width of, say, 1/2 a cycle
> of the expected oscillator frequency, starting at t=0.
> [...]
Bill and Jim,
many thanks for your answers, for the tips and the pointer to the book.
This evening I will try the example oscillator that Bill has sent in a
separate message and the insertion of a VPULSE
as suggested by Jim. Yes, I have noticed that the value for the
"Maximum step" in the simulation usually
needs to be shortened from what PSpice suggests you.
PSpice seems to be a powerful tool, albeit with some quirks, i.e. it
does not recognize (my version at least) the capital
letter M as a prefix for Mega... I had inserted a resistor of 1M, only
to have a few femtovolt across it.
When I changed it to 1e6, everything was ok. Probably it interpreted the
1M as one milliohm... may be they need a refresh
on the MKS system...
73 Alberto I2PHD
Dear Alberto,
never use letters for abrreviation for decimal units. Instead:
100 Ohm: 100 = 1E2
1kOhm: 1E3
1 Milliohm: 1e-3
Always use the basic units .
The Spice Abbreviation for Mega is Meg or meg
for Milli is m
73, Hans-Albrecht DK 8 ND
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