Multisim and Ultiboard

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Frequency dependent switch

 

I'm looking to build a frequency dependent impedance (by a frequency - impedance table).

 

For now I got to the point where I have a frequency dependent Voltage Source. I tried to add a Voltage/Current Controlled SPST that would only switch on in a narrow frequency band. Parallel branches would lead to an approximation of the necessary frequency dependent impedance.

 

I do notice that while excecuting the 'AC analysis' the switch does not switch at all. Is it possible to build a frequency dependent switch with the Voltage/Current Controlled SPST that works with the 'AC analysis'? Alternatives?

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Dhr,

 

AC analysis linearizes the signal path (ie no switching, or nonlinear behavior whatsoever).  Try using a chirp signal and set F-0 and F-final (the switch should turn on through the chirp signal when the frequency goes through your band).

 

Regards,

Pat Noonan

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