Re: gEDA-user: Verifying ngspice with an RLC sample in given link

["Daniel B. Thurman" <dant@xxxxxxxxx>]

On 03/02/2011 10:05 AM, Daniel B. Thurman wrote:
> On 03/02/2011 09:55 AM, Vladimir Zhbanov wrote:
>> On Tue, Mar 01, 2011 at 05:59:42PM -0800, Daniel B. Thurman wrote:
>>> Hi, I found the time to go back to my past
>>> and revisit spice (used older Berkeley spice then)
>>> so I tried a simple RLC circuit from the following
>>> link and using ngspice:
>>>
>>> http://www.allaboutcircuits.com/vol_2/chpt_6/3.html
>>>
>>> Unfortunately, I was not able to duplicate the
>>> plots as shown in the above link.  I am assuming
>>> that the author is using something other than ngspice
>>> or I am doing something wrong?
>>>
>>> Attached is the rlc.sch file with the same circuit sans
>>> the circuit netlist but it can be easily generated:
>>>
>>>> gnetlist -o rlc.cir -g spice-sdb rlc.sch
>>> The contents of rlc.cir is:
>>>
>>> *********************************************************
>>> * Spice file generated by gnetlist                      *
>>> * spice-sdb version 4.28.2007 by SDB --                 *
>>> * provides advanced spice netlisting capability.        *
>>> * Documentation at http://www.brorson.com/gEDA/SPICE/   *
>>> *********************************************************
>>> *==============  Begin SPICE netlist of main design ============
>>> L1 0 3 10mH
>>> C1 3 2 10uF 
>>> R1 1 2 1 
>>> V1 1 0 dc 0 ac 1 sin
>>> .end
>> L1 is 100mH there. Could it help?
>>
>> --
>> VZh
> Duh oh!  That worked!
> Reminder to self: Get some hi-powered glasses and strong coffee!
>
> Thanks!
There seems to be a problem; v(3) plot is inverted,
otherwise the other nodes probes look good. Perhaps
this has to do with "vm" which is not a recognized
vector, so I just used "v" for node probes. Other than
that, it looks good.



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