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Design a precise Analog Multiplier with amp

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professional Analog Multiplier chip is very expensive,such as AD632.
So i want use amp to design a Analog Multiplier by myself,But how can i to consider some parameter about it?
 

What is the word "amp". Do you mean amplifier. If so you can not design any multiplier by any amplifier.

Thanks
 
You can design in transistor level any multiplier.
For that search the internet for Gilbert Cell or Gilbert multiplier.

Thanks.
 

The NE602 and NE612 are mixers containing a Gilbert cell and they are
inexpensive.

Tornado
 

You can build an analog multiplier using two log amplifiers, an exp amplifier (also called anti-log amplifier) and an adder. For details you can check:

hxxp://www.ligo.caltech.edu/~vsanni/ph5/BasicOpAmpApplications.pdf
 

The link is down. Pls. upload it here.

Thank you,
 

It is not down ! Have you tried to substitute the 'x' by 't' in the 'http' ?
 

You can use lineer optocoupler for multiply operation.
 

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