Question

1. Comment on the effect on the clamping (DC shift) by changing the frequency of the signal.

2.Does the value of the resistor determine the correct operation of the clamping effect?

Answer 1

Solution

1.When we are changing the frequency (1/T) of input signal accordingly time constant of the circuit t=RC should be chosen for good clamping.

2. The values of the resistor R and capacitor C in the clamping circuit should be determined from the time constant equation of the circuit, t = RC. The values must be large enough to make sure that the voltage across the capacitor C does not change significantly during the time interval the diode is non-conducting. In a good clamper circuit, the circuit time constant t = RC should be at least ten times the time period of the input signal voltage.