 
  
  
  
  
To obtain a differentiation circuit we replace the input resistor of the inverting amplifier with a capacitor as shown in figure 6.9.
   
 
Figure 6.9:  Differentiation circuit.
Replacing   with
  with   in the voltage gain gives
  in the voltage gain gives
  
 
or
  
 
Using dV/dt=I/C gives
  
 
and thus the same result as above.
The frequency response is shown in figure 6.10.
   
 
Figure 6.10:  Differentiation circuit frequency response.