Re: [Qucs-help] Qucs 0.0.8 for Mac

[Stefan J. <st...@gr...>]

On Do, 9.02.2006, 23:34, Manley Head wrote:

Hello!

> The circuit you sent is exactly like mine but it does not work on my
> Mac.  All I get is 0 for all frequencies!

Hm.

> Also when I pull up "Simulation/Show last Netlist" , an editor window
> appears with nothing in it!

And what about the ~/.qucs/netlist.txt?

> I guess I am going to have to download the
> PC version for Windows XP and try that.

Actually it should work.  I really wonder why this is... Markus?

>  My present objective was to
> build a noise source that represented the spectral noise shape of an
> oscillator (1/f, 1/f^2, 1/f^3 etc.) so that I could simulate the
> affects in a PLL.
> I have a PLL simulation that uses VCVS's to represent all the transfer
> functions in the loop (only in the phase domain) , hence my discovery
> that the VCVS did not work with a time domain simulation!
> I was sure hoping for a good simulation package for the Mac though!

I see.

>> On Do, 9.02.2006, 16:31, Manley Head wrote:
>>
>> Hi!
>>
>>> I also found that my problem with the noise voltage source is not
>>> because I did not have noise calc. turned on in Simulation box, as
>>> some
>>> one of you suggested.  All  I have is a noise voltage source connected
>>> to a 50 Ohm resistor through a current meter. The source and the
>>> resistor are grounded.  I have a DC and an AC simulation block, The ac
>>> simulation block is set for a freg. range of 1 Hz to 1 Mhz, Log freg.
>>> ,
>>> points=19; noise=yes. The noise source coeficients are; i=1e-6, e=1,
>>> c=1, a=0.   Also I have a pin label on the resistor for measuring the
>>> voltage.
>>
>> Something like the attached?  Looks fine for me...
>>
>>> By the way, I was going to send you a net list but apparently that
>>> does
>>> not work either!  Do you do that through the "Simulation/Show last
>>> Netlist" menu?
>>
>> Yes, this is possible.  Also you may send the file
>> ~/.qucs/netlist.txt.
>>
>> Cheers, Stefan.<vnoise_test.png>

Stefan.