Electronics Forum / CAD / May 2004

I have LTSpice 05/24/04 version.  The circuit attached won't .op with
the 2-pole op-amp as shown.
Any idea how to make it more amenable to converging?
I stuck the B source in so I could use an ideal opamp in place of U4 and

when opening ver 7 in orcad 10 the drill symbols are missing?
doing a clean, then  save, re-open with ver 7, and symbols in drill
chart return.
would like to use 10 to create gerbers, but drill gerber has no

Hello group,
I'm having problems with the spice simulator. At the end of my
simulations I always have a simulation error. During the simulation
everything works fine

 Does anyone know of a mechanical 3-D CAD package for the Mac?  I'm
interested in modeling my next robot and want a package that works for
my Mac.
thanks,

I admit I'm not a seasoned LTspice user, but after looking at FFT,
available in the plot window, I have concluded that it only provides
magnitude data, not phase data.  At least I couldn't find phase data.
Can anyone confirm this? If this is true, is there anyway to get both

I know that was quick but I just couldn't bare more than 10 minutes
with XP. After just minutes of using XP and trumpeting it's advantages,
I have tried my patience with Windows and quite honestly there is really
no comparison between flimsy, unstable Windows software and the ...

Sending request for ip: 213.131.75.98...
inetnum:      213.131.64.0 - 213.131.79.255
netname:      LINK
descr:        Link Egypt

You're about to get tossed..............
Path: uni-berlin.de!fu-berlin.de!news.glorb.com!wns13feed!worldnet.att.net!attbi_s04.POSTED!not-for-mail
From: terrry_porter@yahoo.com (Terry Porter)
Newsgroups: comp.os.linux.advocacy,alt.os.linux,alt.os.windows-xp,sci.electronics.design,sci ...

I am currently developing a module library containing both block
diagrams and loads of text. It is supposed to become both a nice user
manual for the product at end as well as an implemetation guide for the
implementer. Currently I use Visio to draw these block diagrams because

I was using AD630 in a Lock-in Amplifier Design and Simulation. But it
seems so difficult to simulate the circuit,the pin
2(CHA+),18(CHB+),7(STAT),12(COMP) needs not to be connected.If I leave
them alone,the pspice will report that

Is there a way to make Protel re-sequence all of the component references on
a schematic?
For example, if I want to duplicate a schematic page that has component
references

Hi all,
  i am using Multisim to learn the basic electronics. and i hit a
problem. the symbol of ua723 in Multisim contain only 3 pins while it
actually has 14? how to do with it??

I am trying to draw an ellispe for a solder mask and the only tools
that I have to do that are the Arc tool.  Needless to say, my Ellipse,
looks like crap.  Is there any way to may a real Ellipse in Veribest?
Thanks!

I would like to measure the VSWR (or the small signal output impedance)
of a circuit I simulate (using PSpice A/D by Cadence).
What would a circuit look like, that indicates the VSWR of the circuit
loaded with a given impedance, or how would I have to calculate it using

I asked this once before with no usable results ..
Does anybody know of a PDF file to Gerber file converter?
Thanks!!
Dave