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controlling the capacitance

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Faitie

New Member
Hi all ,

I have this question i'm pritty annoyed with.
Would it be possible to controll the capacitance of a capacitor with PWM.
I would use somthing like the picture below.

https://lh3.ggpht.com/_oCFhiqXq280/S2CChEAaPGI/AAAAAAAACzY/uNcLeDvLQBQ/s1024/GPR - R.png

V1 would be the audio and V2 would be the PWM signal.

I'm asking because i'd like to make a speaker simulator. So i can recreate all sorts of impedance curves to test amplifiers without actualy owning the speakers.

ty for ur help.
 
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