Re: gEDA-user: Is there a *official* JFET symbol in gEDA?

[Anthony Shanks <yamazakir2@xxxxxxxxx>]

I see, I didn't know whats how spice-sdb works, never really used that
backend, just the spice one.

What do you mean by overloading? Nearly every symbol shipped with
gschem has a device attribute (caps, resistors, etc.), so it's safe to
use the device attribute unless people are manually deleting it, thus
freeing up refdes (this is how every other schematic/netlisting flow I
have ever used works in the professional field). In what instance
would people be setting the device to a part number? spNet is designed
for the purpose of spice simulations, so if people are using discrete
analog components and subckts this shouldn't be an issue. If people
are using spice models of the components they are using this is taken
care of with the value field.

On Fri, Jun 26, 2009 at 6:32 AM, John Doty<jpd@xxxxxxxxx> wrote:
>
> On Jun 26, 2009, at 4:02 AM, Anthony Shanks wrote:
>
>> The device property has nothing to do with simulations.
>
> Depends. spice-sdb uses device as part of the process it goes through
> to determine what prefix letter, if any, to add to the refdes to
> comply with SPICE conventions.
>
>> IIRC gnetlist
>> chooses how to netlist a particular symbol according to it's refdes
>> and uses the value property as the value for netlisting. I don't think
>> the device property is used for anything. I am however making spnet
>> use the device property for netlisting to decide what the device is
>> and leaving refdes open for choice.
>
> I don't think this is a good idea. You are overloading an attribute
> that is already used for other purposes. Often, it's a part number.
>
> John Doty              Noqsi Aerospace, Ltd.
> http://www.noqsi.com/
> jpd@xxxxxxxxx
>
>
>
>
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