Bug in OrCAD Crapture

Jul 04, 2008 9 Replies

In OrCAD Crapture, wiring as below...


----.---------------> GND __|__ --- -



Wiring from a ground symbol to a port name, the "zero" node effect is lost, giving "floating node" errors and all kinds of nonsensical grief.



Cured by inserting a zero-volt voltage source:


----.---------(=)-----> GND __|__ --- -



I have a small "(=)" symbol which netlists as a zero-volt voltage source that I use to make node-name-to-node-name connections without losing the uniqueness of each name.



...Jim Thompson



-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

formatting link
| 1962 | | | | America: Land of the Free, Because of the Brave | | | | Due to excessive spam, googlegroups, UAR & AIOE are blocked! |


You mean OrCad can't even do that anymore?

----. .-------> GND PORT __|__ __|__ --- --- - -

Was no problem with SDT.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

Not a problem with PSpice Schematics either. Only caught it when I converted a PSpice Schematic to OrCAD Crapture... saved by Charlie Edmondson's insight... Thanks, Charlie!

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It\'s what you learn, after you know it all, that counts. Due to excessive spam, gmail, googlegroups, UAR, AIOE are blocked!

No problem.

The problem is so bad in ConceptHDL that they included the symbol to do that - connect two different named nets. In Capture, the only place you really need it is for power and ground nets, where you can't tolerate the name changes...

Charlie

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I had created my own part, NODE2NODE, in PSpice Schematics, to handle temporary ties during simulation without losing the individual names, so it was a piece-a-cake to add it into anything undergoing Crapturization ;-)

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It\'s what you learn, after you know it all, that counts. Due to excessive spam, gmail, googlegroups, UAR, AIOE are blocked!

When I read this and other stuff I wonder why you and others are still using OrCad. I don't anymore.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

I'm not, but I have customers who insist on documentation presented in Crapture format.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It\'s what you learn, after you know it all, that counts. Due to excessive spam, gmail, googlegroups, UAR, AIOE are blocked!

Then I must be rather lucky. None of mine require that.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

I have worse problems than that, some want Cadence Composter and some want SPE :-(

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | It\'s what you learn, after you know it all, that counts. Due to excessive spam, gmail, googlegroups, UAR, AIOE are blocked!

I'd probably try to convince them to have it transcribed by someone. This was done a few times in my cases since my clients use all kinds of CAD systems, one even AutoCAD (including the schematics). Adds a couple hours of my time to check the results but it sure is cheaper for the client. Beats having to pay for a complete seat plus my training.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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