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How to add noise in v source?

madhusudha

We are working on a project using cadence virtuoso 6.1.4 that requires us to add noise to the circuit.Could someone guide us as to how we can add noise to vsource?Also could we get some suggestions about  number of noise/frequency point and its parameters in Vsorce analog library.

Thanks in advance! 

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  • Hi,

    you can just select analogLib vsource, in the Properties form (select the source in the schematic view and type "q") you will see a CDF parameter called "Noise file name" and the next one is "Number of noise/freq pairs". If you type "2" into this latter field, other fields will appear : Freq1, Noise1, Freq2, Noise2.

    If you are exploring possibilities, you can just type there as many points as you like and see your circuits' reaction to that.

    Otherwise, you can point the source to a Noise file. This is just a txt file with pairs freq/noise. You can run an AC simulation on another circuit and save the output to a file (as in saving a waveform to a table) and then use this output in other circuits, just by linking it through a vsource. Or through an isource, if the output of your previous simulation was an inoise :)

     Hope this helps,

     Michele 

Reply

  • Hi,

    you can just select analogLib vsource, in the Properties form (select the source in the schematic view and type "q") you will see a CDF parameter called "Noise file name" and the next one is "Number of noise/freq pairs". If you type "2" into this latter field, other fields will appear : Freq1, Noise1, Freq2, Noise2.

    If you are exploring possibilities, you can just type there as many points as you like and see your circuits' reaction to that.

    Otherwise, you can point the source to a Noise file. This is just a txt file with pairs freq/noise. You can run an AC simulation on another circuit and save the output to a file (as in saving a waveform to a table) and then use this output in other circuits, just by linking it through a vsource. Or through an isource, if the output of your previous simulation was an inoise :)

     Hope this helps,

     Michele 

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