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How do you use operational amplifier as differentiator and adder/subtractor.
Fig. shows differentiator or differentiation amplifier. As its name implies, circuit performs mathematical operation of differentiation; that is, output waveform is derivative of the input waveform. Differentiator can be constructed from a basic inverting amplifier, if an input resistor R1 is replaced by a capacitor C1.
Expression for the output voltage can be obtained from Kirchoff's current equation written at node v2 as follows:
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Q. When the negative feedback is practical to an amplifier of gain 50 the gain falls to 25. Compute the feedback ratio? Af = A / 1 + Aβ 25 = 50 / 1 + 50 β 1 = 2 / 1 + 50
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