Question

The circuit shown in the figure is a

• A. negative clamper
• B. positive peak clipper
• C. positive clamper
• D. differentiator

Hint:

Clamper shifts waveform vertically without changing shape.

Answer 1

The Correct Option is C

Step 1: Identify clamper action by the direction of shift.
A clamper preserves the waveform shape but adds a DC level to it. A positive clamper shifts the entire signal upward so that the most negative point of the waveform just touches 0 V. A negative clamper shifts it downward.

Step 2: Trace circuit action by half cycle.
During the negative half cycle of the input, the diode is forward biased and the capacitor charges to the peak negative voltage $V_p$. On the positive half cycle, the diode is reverse biased. The capacitor voltage $V_p$ adds to the input, lifting the waveform.

Step 3: Determine output range and type.
The output swings between $0$ (minimum) and $2V_p$ (maximum). Since all output is at or above zero, the waveform is entirely positive. This is a positive clamper. \[ \boxed{\text{Positive clamper}} \]