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What is concept of virtual ground in case of op-amp?

Updated: 8/17/2019
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Irfanahmadkhan

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14y ago

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if non inverting terminal is grounded and input is applied to inverting terminal then as the difference in input voltage should be ideally zero the potential at inverting terminal is also assumed to be zero

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Q: What is concept of virtual ground in case of op-amp?
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In case of Operational Amplifier,the voltage gain is very high. So by AV=Vo/Vi we can conclude that Vi is very small quantity. Approximately we can take Vi=0. So potential difference between input terminals becomes zero.And in most of the cases we consider a terminal grounded.So potential of other terminal also becomes zero. This is called Virtual Ground Concept.


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