Re: [Help-gnucap] [Fwd: [Fwd: Open node in transistor circuit]]

[Rubén Gómez Antolí]

A long long time ago....

Hello all,

Well, I "lost in time" this answer but trouble persist until today.

al davis escribió:
> Sorry about the delay.  I am travelling.
>

Sorry me too, I don't see this answer.

> HTML postings and postings with attachments are held for moderation, 
> which may add a few days before anything appears on the list.  Please 
> use plain text, and include netlists as plain text.
> 

Im not use HTML and I attempt to avoid attachment, the circuit originaly
was sent in body of message, but is good to know what happens about my
mails.

> [...]

> On Wednesday 06 December 2006 06:03, Rubén Gómez Antolí wrote:
>>>> [...]

>> I test with "2006-11-20" and (yesterday) "2006-12-04" version and
>> circuit doesn't work. (PowerPC machine here)
>>
>> I test too in another machine -amd 64- and I obtain again «open node»
>> and same issue on outputs.
>>
>> Gnucap version on these other machine is Debian Sid version.
>>
>> I test circuit with Ngspice and I obtain the results that I'm wait.
> 
> Please post the circuit.  Include it as plain text.  The list is 
> configured to hold for moderation any post that is not all plain text.  
> Then, even if accepted, it removes attachments and html. 
> 

------------- circuit -----------------
TRANSISTOR CIRCUITO TRANSISTOR CON CARGA RESISTIVA

VCC      1      0      10

VE       4      0  PULSE(0  8   0   0   0   0.5M   1M)

Rc       1      2      1K
Rb       4      3      8200

Q1       2      3      0      Q2N3055

.model Q2N3055  NPN (Is=974.4f Xti=3 Eg=1.11 Vaf=50 Bf=99.49 Ne=1.941
+               Ise=902.5p Ikf=4.029 Xtb=1.5 Br=2.949 Nc=2
* Isc=0 Ikr=0
+               Rc=.1 Cjc=276p Vjc=.75 Mjc=.3333 Fc=.5 Cje=569.1p Vje=.75
+               Mje=.3333 Tr=971.7n Tf=39.11n Itf=20 Vtf=10 Xtf=2 Rb=.1)

.print tran V(3) V(4) V(2) I(Rb) I(Rc)
.tran 1u 3m 0 >salida.simu2.tran.dat

.print dc V(3) V(4) V(2) I(Rb) I(Rc)
.DC VE 0 8 0.01 >salida.simu2.cc.dat


.END
------------ end of circuito ---------------

Note "* Isc=0 Ikr=0", this is a *little* difference with my original
circuit on december.

Let's go to see man of Gnucap:

------- Gnucap man --------
    Entering a parameter value of 0 is not the same as not specifying
it. This behavior is not compatible
with SPICE. In SPICE, a value of 0 is often interpreted as not specified,
with the result being to calculate
it some other way. If you want it to be calculated, don’t specify it.
------ end of man ------------


Conclusion, is too *good* read carefully manual.

> You should get the same results with gnucap and ng-spice, within a 
> reasonable tolerance.

Now, I obtain these "reasonable tolerance" in the results with gnucap
and ng-spice.

Well, this thread is too old but for me was unresolved and I want nobody
(newbies as me) should way across this how me happens.

Thanks to all for your answers and your time and for to suffer my very
bad english.

Regards.

Salud y Revolución.

Lobo.

-- 
Libertad es poder elegir en cualquier momento. Ahora yo elijo GNU/Linux,
para no atar mis manos con las cadenas del soft propietario.
---------
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http://www.counter.li.org