Electronics Forum / CAD / January 2004

 Could somebody please give me a hint on what to do about the ERC
analysis in Protel99SE giving me "floating input" errors in ALL my
input pins connected to a BUS.  For example, a memomory address bus
connected to the address pins in the part, they all give me this

Hi,,
I admit I don't use LTS much but wanted to try the wav file input
feature not available in PSpice student version and try some signal
processing..  But I couldn't find the comparable math blocks like

I have designed a protection circuit for some outdoor equipment that
could be exposed to lightning strikes. The discrete components are PCB
mountable but I can't find any guidelines for sizing the traces for
high current from a strike. Any references for determining trace

I have a part in a library, under OrCAD capture 9.0, that we got from a
third party. However, I suspect it's corrupted. It's a heterogeneous part,
but irritatingly, there's one too many parts in the package. One of the
"parts" is blank. So I want to delete it. However, when I ...

I have an urgent need for a transistor level (BJT, MOSFET, passive +
active element) schematic drawing tool ?? Anything free out there ??
BTW, an exisiting Visio template will also do the job.
Thanks for your input in advance,

I am getting really desperate - it seems that Protel DXP autorouter
starts with random failures from some complexity of the board.
It is constantly leaving some small artifacts in the routed design
(even the autorouter claims full route no contentions) when doing

I'd like to know how to get a gate sim to output other values like
Vol max and Voh min and even sweep the levels.
How do you do that?

Hi, All:
I need to design a decimation filter in VHDL / Verilog, and convert VHDL
code to layout.
I have already design a sigma-delta modulator for 4 KHz input signal, 1.040

This simple thing:
* Y:\spice\LT-SWcad\impulse.asc
V1 N001 0 EXP(0 10 1n 1n 10n 1m)
.tran 10m

I am in desperate need of a SPICE model/subcircuit for a negative voltage
regulator. I made a previous post for an LM337, but anyone would do. (LM337
still prefered though). ANY help would be much appreciated.
Thanks,

Anyone that knows from where can I download Hi-tech picc18 v 8.30 full
version?

I haven't done this in years, so could I have everyone's opinion for
best hard drive cloning software?
I have one that's starting to exhibit clunking noises and I'd like to
copy it *now* so that I don't have to do massive software re-installs

Anyone that has
the hi-tech pic8 v8.30 soft?

My investement in CircuitMaker is substantial, over years, and it has
many features I like (including its extensive library). So I'd
probably never willingly abandon it. But it's clear that
LTspice/SwitcherCAD III has many strengths (including its support

Due to a heavy, but probably temporary, workload, we are currently
considering outsourcing several of our upcoming PCB layouts. We use
Innoveda Viewdraw as a schematic entry tool, and Allegro as our PCB
layout tool. The work is for high speed,impedance controlled PCBs,