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What is the output?

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

• Multiplier

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mav3r1ck_2k

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What is the output of the given circuit?

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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?

I'm gonna guess zero output. Tell me if I'm right Maverick.

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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.

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.

What does the circle with the X in it mean?

What does the circle with the X in it mean?

My thoughts exactly prior to reading all the posts....

My thoughts exactly prior to reading all the posts....

hi chippie,
Its a symbol for a multiplier operator.

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@ dknguyen

I'm gonna guess zero output. Tell me if I'm right Maverick.

Hello.. Thanks 4 ur interest in the question. How did u get the zero output...? What conditions did u assume...?

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

mav3r1ck_2k,

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