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Subject: Re: Problems with Electronics Workbench - timestep errors
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Date: Thu, 10 Oct 2002 07:21:33 GMT
NNTP-Posting-Date: Thu, 10 Oct 2002 09:21:33 MET DST
"Kevin Aylward" schrieb im Newsbeitrag
> To understand electronics *at all* you *must* learn what these terms
> mean. These particular terms are *so* basic, that if you don't want to
> learn them, you should give up electronics. I mean it. Its that simple.
> Why? see below.
> Look, I can give ABC instructions for you to build an oscillator,
> however, building it would mean nothing. It would not show that you
> understood *anything* at all about electronics.
> 1 If you want to do a frequency response of a circuit, you *must*
> *know/learn/understand* that you need to generate an *AC* signal and do
> a frequency response plot of AC signal output verses frequency. You need
> to know how to set-up generators to do this. For example, what if you
> want top look at power supply rejection as well etc...You need to know
> what an AC response actually means.
> 2 If you want to look at a signal in the time domain, you *must*
> *understand* that you apply , for example, a Sine wave, square wave, or
> triangle wave and specify it by parameters related to what it looks like
> in time. You need to know what an Transient response actually means.
> Sure, you can connect up signal generators and scopes and see all the
> little bitty pretty pictures, if that makes you happy, but you wont be
> doing electronics.
> Kevin Aylward
Kevin, I have been using PSpice since 1985. Remember the 5.25" floppy with
the laser hole as a copy protection? We used a hot needle on a diskcopy to
have the same effect, as there were no student or trial versions available.
Those times there was no user interface or capture yet, so I know very well
to operate this program script driven. The graphs were just ASCII with
But when I first tested your Superspice, I couldn't operate it. OK, it was a
free beta version without the connection dots, bugs, the graph window looked
ugly and despite all the features you were advertising I felt as much at a
loss as the Lost Angel now.
What was annoying me was the at least weekly updates, on a dial-up 1/2 an
hour at night. Each time the bitmap with that guitarplayer K.Aylward again.
The missing help files...
Now it will be better hopefully, the "phantastic filters" was a really good
step into this direction, where a proper schematic ready for simulation is
Put even simpler models like this for the beginner, an non/inverting opamp
stage single/dual supply ac/dc operation for example; and have the
simulation parameters setup to the appropriate values.
This should give the beginner an immediate positive result, and the
motivation is the most important parameter learning the GUI.
Hope this helps explain to you what newcomers might encounter...