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Ocillators


Summing differentiator

The following figure shows the configuration of op-amp as summing differentiator.

Differentiator21
Let assume that the inverting terminal of op-amp is at potential ‘V’
Due to virtual ground concept V= 0
Applying KCL at node ‘V’, we get
I=I1+I2
Differentiator22

Thus the above circuit gives addition of derivatives of two input signals V1 and V2. Thus acts as summing differentiator.



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