Subject: Re: MicroCap 7 Question
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Date: Tue, 10 Sep 2002 20:47:38 +0100
NNTP-Posting-Date: Tue, 10 Sep 2002 20:47:59 BST
"Rich Osman" wrote in message
> I'm working with the demo version trying to get it to do an AC
> of a simple opamp circuit. It's an inverting amp with a 100K input
> feedback resistor and a 470 pf feedback cap. I've named the input and
> output nodes 'in' and 'out', power the opamp from a set of battery
> components, and fed the input with a sine source. The opamp model is
> I get a flat line for amplitude and phase, zero gain and phase shift
> hz to 10 Mhz.
> How does MicroCap determine the stimulation source? Are all sources
> automatically swept in frequency?
The first thing that comes to mind here is that you may not have set a
voltage source to have an *AC* value, e.g. 1V. It might default to 0V,
hence the Odb. The sine source has values to set for its frequency and
amplitude used in a transient run, but that does not set the AC run
value. However, there should be a field in its setup to allow you to set
its AC value.
What I must say though is the obvious, MicroCap is outrageously priced.
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.