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What is the output?

What can be the F?B be considered to be?

  • Multiplier

    Votes: 0 0.0%
  • Adder

    Votes: 0 0.0%

  • Total voters
    0
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smanches

New Member
The output is irrelevant as it's an incomplete circuit. What is your purpose for asking the question? What's the story behind the question?

Is this homework?
 

dknguyen

Well-Known Member
Most Helpful Member
I'm gonna guess zero output. Tell me if I'm right Maverick.
 
Last edited:

MikeMl

Well-Known Member
Most Helpful Member
What is the output of the given circuit?
Minus rail (i.e. most negative the amplifier is capable of).

Say the output is slightly negative or slightly positive. That makes the output of the multiplier slightly positive, but near zero.

An opamp with -1V at it's +input and ~0V at it's -input is driven to the minus rail by it's open-loop gain.

Minus rail multiplied by itself makes positive rail, which makes the difference between -input and +input even bigger, so Minus rail at the opamp output is a stable solution.
 

crutschow

Well-Known Member
Most Helpful Member
Interestingly, for any input above 0V the output will be the square-root of the input. But if the input goes slightly negative, which inverts the feedback polarity, then the output will go to the negative rail.
 

smanches

New Member
What does the circle with the X in it mean?
 

xtrmi

New Member
"Its a symbol for a multiplier operator." I learn something everyday on this forum. I was wondering the same thing as everybody else.
 

MikeMl

Well-Known Member
Most Helpful Member
mav3r1ck_2k,

The answer is NOT zero. Did you bother to read the entire thread?
 
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