Date: Tue, 17 Sep 2002 15:35:49 +0200
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From: "Hans-Albrecht Haffa" <haffaha@web.de>
To: rsgb_lf_group@blacksheep.org
Subject: Re: Re: LF: PSpice milli/Mega R
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rsgb_lf_group@blacksheep.org 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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