Clamper, Clamper Circuit, Diode Clamper Circuit, Clamper Electronics, Clamper Circuit Analysis

Clamper, Clamper Circuit, Diode Clamper Circuit, Clamper Electronics, Clamper Circuit Analysis

What is Clamper?

Clamper circuit fixes one extremity of a wave form to a certain voltage level regardless of changes in the input wave form. Thus in the clamper circuit the input and output signals have the same shape but different dc levels.

POSITIVE CLAMPER

Drawing output of Circuit Below: 

CLAMPER 1:

The input to the circuit is sine wave here.

In the first +ve cycle of the diode D is reverse bias.

During the first –ve cycle of the input the diode D is forward bias. Current in the circuit will flow from point B-D-C-A. This will charge capacitor C in the shown polarity to the peak input voltage (Vm). Applying KVL in –ve cycle.

Capacitor Voltage Vc is Vm.

Now Applying KVL in +ve cycle.

The circuit has a output in which the waveform is shifting up thus it is called Positive Clamper.

Drawing output of Circuit Below (Biased Clamper):

CLAMPER 2:

During +ve Cycle, Apply KVL

Drawing output of Circuit Below (Biased Clamper):

CLAMPER 3:

During –ve cycle

During +ve cycle

NEGATIVE CLAMPER

If we turn the diode, the polarity of capacitor voltage reverses and the circuit becomes negative Clamper.

Drawing output of Circuit Below:

CLAMPER 4:

Drawing output of Circuit Below (Biased Clamper):

CLAMPER 5:

During +ve cycle

Drawing output of Circuit Below (Biased Clamper):

CLAMPER 6:

To calculate Vc

To Calculate Vo