[Qucs-help] Fwd: phase or frequency modulator

[Federico M. <fm...@fc...>]

Vadim,

Thank you, sorry, I hadn't noticed it perhaps because it is labelled 
SFFM instead of just FM. However these sources seem to allow sinusoidal 
modulating signal only. It would be very useful to be able to apply an 
arbitrary modulating signal, particularly the output of a previous circuit.

One possible workaround would be to previously create the signal, save 
it to a .dat file and use it in a file-based source.

Regards,

Federico Miyara


On 6/10/2025 06:39, Vadim Kuznetsov wrote:
> Hello Federico,
>
> Modulated sources are available for SPICE mode too. Scroll the sources 
> group on the left panel to the down and look for V(SFFM) I(SFFM), 
> sources. These components represent frequency modulated sources.
>
> Regards,
> Vadim
>
> On 10/6/25 06:18, Federico Miyara wrote:
>>
>> Dear all,
>>
>> I find that Qucs-S doesn't have a phase or frequency modulator source 
>> under Ngspice as is the case with Qucsator. The problem is when one 
>> actually needs to use SPICE. Is there a simple way to create such a 
>> source?
>>
>> Regards,
>>
>> Federico Miyara
>>
>


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