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Whats the simplest circuit with square function?

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poloalex

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Squarer circuit!~

Hello ,
Can anyone please tell me what's the simple circuit with square function?
It's better for high frequency and available on CMOS process.

Thanks .
 

Squarer circuit!~

u can use oscillator(generator of sin wave) and follw it by comparator

if in>0 ----> out=5v
if in <or =0------>out =0v
 

Re: Squarer circuit!~

The simplest squarer circuit is actually a MOSFET because the output current is proportional to the square of VGS in the saturation region. Actually, it is usually a current mode working. For independance of VDS, you ofcourse can cascode the Common source amplifier.
 

Re: Squarer circuit!~

just a mos
add a cascode
 

Re: Squarer circuit!~

ragabs said:
u can use oscillator(generator of sin wave) and follw it by comparator

if in>0 ----> out=5v
if in <or =0------>out =0v
Click to expand...

Is it a square circuit?
I think it will a square wave.
Can you tell in detail?
Why?
Thanks.
 

Re: Squarer circuit!~

Ya~ Just a MOS . That's a good idea. Thanks!
But, has any other circuit with square function ?
I provide one as listed below. Iout=Iin²/4Iα (ref:Analog IC design:the current-mode approach , C.Toumazou ,1990)
 

Re: Squarer circuit!~ Query

I understand the concept of the square law i=f(vgs^2) but
can anyone explain me how you can produce a current squarer based on this law?
I am reffering specifically on pages 16-17 of the below book
http://www.ifi.uio.no/in241/Gruppe/avlsi.pdf
("Why, Where and How? Eric A.Vittoz CSEM")

How on earth is the relationship 37 produced?

Thanks in advance
Giorgos
 

Re: Squarer circuit!~

Giorgo, yeia!

It is better to check : Gray -Mayer 2001ed. on page 708.

You will get the full mathematical explanation on the squarer.

Dimitris
 

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