[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Rubén Gómez Antolí
Subject: Re: [Help-gnucap] [Fwd: [Fwd: Open node in transistor circuit]]
Date: Mon, 05 Mar 2007 13:43:53 +0100
User-agent: IceDove (X11/20061220)

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

> [...]

> 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 -----------------

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 >

------------ 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.


Salud y Revolución.


Libertad es poder elegir en cualquier momento. Ahora yo elijo GNU/Linux,
para no atar mis manos con las cadenas del soft propietario.
Desde El Ejido, en Almería, usuario registrado Linux #294013

reply via email to

[Prev in Thread] Current Thread [Next in Thread]