Electrical Engineering ⇒ Topic : Differentiator
|
Gaurav
| |
Differentiator In this circuit, the passive elements of integrator, i.e., R and C are interchanged. Figure (1) shows the schematic diagram of a differentiator. In this case, the output voltage is proportional to the derivative of input voltage. Figure (a) Differentiating circuit using OP Amp. Using KCL at node 1, it can be written as: IC = IR If Vi is the voltage at node 1, it can be given as: Therefore, the output voltage V, is equal to the product of time constant RC and the negative rate of change of input voltage with time. A differentiator circuit performs the reverse of the integrator circuit, i.e., if the input of differentiation is rectangular wave, the output will be square wave. It is generally used in wave-shaping circuits to detect high frequency components in an input signal. It is also used as a rate of change of detector in frequency modulator. It has the following drawbacks:
| |
| |
!! OOPS Login [Click here] is required for more results / answer