Electronics Forum / CAD / August 2006

Iam designing a pcb layout for one circuit , i want to pour all the
layout and attaching to GND net  once one problem has came after
drawing copur pour obstical it was not visiable.how to make it visable?

Excuse the longwindedness...
I've been using PADS PCB (2004, 2005 v2) for just over a year and can
succesfully complete alot of different types of boards. I still have yet
to accomplish any heavy high speed or large (100 ball or more) BGAs, or

Does anyone here have any experience with a
program called "diptrace"?  I'd be interested
in any comments regarding the program and about
the company.  I'm especially interested in any

I Have AutoCAD 2005
I want use Func. key F10,F11,F12 for shortcut.
For keys F2-F9 I have change and use for diferent purpose but F10-F12 is not
use for shortcut and I am not activate this keys or other keys.

I recently inherited some schematics and version 10.5 of OrCAD
Capture.  I need to change what's showing in the title blocks.  Is
there a way to set the display properties of all 68 title blocks (68
pages) at once?  So far, it seems that I can only do it one-at-a-time,

I am doing a simulation on Oracd 10.5 student edition. I have
schematics i obtained from some previous labs and they work fine, even
if I re-use these components in other circuits I made. But when I use
new components I obtaine this message:

For Altium Designer, I have been using the QualECAD 3-D viewer
(www.qualecad) plugin to image my pcbs in 3-D, and it's very nice. It
places gray boxes over components that have a height attached to them.
But it can also use VRML (Virtual Reality Modeling Language) models for

Please let me know the PSpice probe data file format.
I guess that the .dat file (generated by probe) is by default a binary
(i.e., non-ASCII) but what is the exact data format for it.
Waiting for your inputs.

am New to PCB board design cycle. Working on circuit having powerPC
interfaced with nand flash,FPGA,DDR and ethernet ASIC. I have to do the
cycle accurate Functional simulation of the above circuit.
How should i go for it?

I'm trying to design an adjustable constant current drive to supply a
current of 250mA.
I've been trying to use OP amps but have been running into problems as
I need to limit the supply voltage to +/- 5v

We are manufacture low cost, high quality PCB prototypes in China.
we also supply RoHS Compliance,Leed Freed PCB prototype.
Silk masks are produced for the same price
Send us a PCB file and we will reply promptly with a quote.

We are manufacture low cost, high quality PCB prototypes in China.
we also supply RoHS Compliance,Leed Freed PCB prototype.
Silk masks are produced for the same price
Send us a PCB file and we will reply promptly with a quote.

I'm simulating an LM833 in inverting mode, very simple. just the two
resistors. And according to all datasheets the GBP of this amplifier is
typicaly 15 Mhz. This means that in the circuit of my amplifier, that
has two resistors of 10K, the gain is 1, so the bandwidth of my circuit

Can the PSpice transformer be used in both directions? That is, can
the secondary be used as the "primary"? I may have a need to have
signals pass in both directions.

I am using OrCAD 10.5 Schematics Capture tool and my design requires
same circuit to be used twice on the board. So I created a hierarchical
block and pasted two instances of this hierarchical block in order to
have same circuit repeated twice. But I am getting error while