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How to simulate the ac performance of fully differential opa

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yakyao

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Thanks first. How to simulate the ac performance of fully differential opa with dicontinuous common feedback? :cry:
 

flatulent

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Re: How to simulate the ac performance of fully differential

Your best bet would be to do a time domain simulation. One method is to do it with discrete frequencies and extract the values from each simulation and plot them. Another more time consuming (in the computer) is to use a swept frequency source that is slow enough that you get a complete AC cycle at closely spaced frequencies. Plot this on a time scale which merges the waveforms into a mass of color as seen on the plotter or your computer screen because of the finite width and great number of pixels in the plot. Select a sweep rate so that the time scale can be converted to the frequency by a simple bit of algebra.
 

jacky2004

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Re: How to simulate the ac performance of fully differential

you can using balun to convert differential signal to single end (verse vice) ,then you can simulate it like single end amplifier
 

borodenkov

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If you have access to Cadence SpectreRF simulator, use PSS and PAC analysis. There is an excellent paper about SC-filter simulation in Cadence at **broken link removed**
 

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