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OP-AMP

OPERATION AMPLIFIER 

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OUT v ?=

Why is this circuit useful ?

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 IN v ( t )

OUT v ( t )

 IN v ( s )

OUT v ( s )

1

 sC 

Another way of solving – using Laplace Transform

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Another way of solving – using Laplace Transform

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Taking the challenges :

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 Without negative feedback, or with positive feedback , an op-amp

acts as a comparator.

If v+ v-   ! ma"imum positive voltage #+$supply%

  If v+ v-   ! ma"imum negative voltage #-$supply%

&ince there is no feedback or positive feedback from the output toinput, the circuit acts as a comparator. 'he circuit(s gain is )ust the

* #infinite gain% of the op-amp.

OUT v

OUT v

None negative feedback or positive feedback

http://en.wikipedia.org/wiki/Negative_feedback_amplifierhttp://en.wikipedia.org/wiki/Positive_feedbackhttp://en.wikipedia.org/wiki/Comparatorhttp://en.wikipedia.org/wiki/Comparatorhttp://en.wikipedia.org/wiki/Comparatorhttp://en.wikipedia.org/wiki/Comparatorhttp://en.wikipedia.org/wiki/Positive_feedbackhttp://en.wikipedia.org/wiki/Negative_feedback_amplifier

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Comparator

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Bistable circuit

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!chmitt trigger circuit

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END