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Use AD834 for a wideband analog multiplier

Question asked by Yung-Cheng on Jul 16, 2015
Latest reply on Jul 20, 2015 by Yung-Cheng

Dear all

 

My circuit design is followed analog devices suggestion(see as attachment 1 Fig.13)

 

And It said its bandwidth is about 480MHz.

 

What I need is a analog multiplier which transfer function W-output=Input1(t)*Input2(t).

 

And the bandwidth over 100MHz.

 

But I test the circuit as attachment and the result is showing also in attachments.

 

The both input is sin(w*t) and the output would be expect be sin(w*t)^2.

 

But its frequency response seems not enough for my acquirement.

 

And the output have a phase delay to my input signal when input signal over few MHz.

 

So Is there improved way to my circuit to solve my problem?

 

Thanks all

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