# implement y=x^2 +2x+1...using op amp

Discussion in 'The Projects Forum' started by abinerd, Feb 7, 2013.

1. ### abinerd Thread Starter New Member

Feb 7, 2013
3
0
hey any1 knws how 2 implement y=x^2 +2x+1, -4<x<4 ..i need help constructing a antilog amolifier

2. ### ramancini8 Active Member

Jul 18, 2012
473
145
I din't understand texting---but I do understand electronics. Look at an AD633 from analog devices. It will give you X^2, and add an op amp to get the final equation.

3. ### atferrari AAC Fanatic!

Jan 6, 2004
3,071
1,149
Hola Ron,

Do you consider analog multipliers like that AD633, obsolete?

I read that so many times that got convinced and decided not to buy one to play with it.

4. ### #12 Expert

Nov 30, 2010
18,093
9,683
@ra...the range of y is +/- 25.

(You probably can understand the txt msg, it's the amolifier that has me stumped.)

5. ### abinerd Thread Starter New Member

Feb 7, 2013
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sorry about the spelling mistake . I was sleepy and did not know what i was typing...thanks for pointing it out

6. ### abinerd Thread Starter New Member

Feb 7, 2013
3
0
hey! anyone knows how 2 implement y=x^2 +2x+1or (x+1)^2, range of x is -4<x<4 .
[ restriction:I cant use any ic] .
I was thinking of constructing a log amplifier ,then using a adder to get 2log(x+1) which will be feed to a antilog amplifier(which by the way i just cant seem to make it work) to get the output..besides i have to come up with alternative ckt wen x=0
I desperately need help constructing a antilog amplifier
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