sinusoidal amp voltage control with dc one.????

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hanifmoallem

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hi.
i have sinusoidal voltage that want to change its amplitude with dc voltage.
in fact i want to control it. what shal i do?
plz help me if you know an IC that do this for me.
it's too important. it's my university project.
thanks.
 

There are several IC's called VGA (variable gain amplifier) which offer the possibility to control the gain with a dc voltage.
 

Hi,
And what about frequency/amplitude range/usable power supplies & load pls?
K.
 

i have 800Khz sinosuidal voltage whit the range of 15v. the load is transformer.
 

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