Dr. R . K Saxena

Professor, Electrical & Electronics Engineering

Global Institute of Technology, Jaipur (Raj.)

Clipper and Clamper Circuits

Analog Electronics

Unit1-Diode Circuits

Clipper and Clamper Circuits

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 2

To see the video explanation, click here :

https://www.youtube.com/watch?v=2jrfPHPHv2Y

Clipper and Clamper Circuits

These circuits are applications of P-N Junction diodes

Clipper Circuits are used to clip off a portion of wave from an input signal

Main element is diode and it is used in two ways series and parallel.

Clamper Circuits clamp a signal to different dc level.

Along with diodes, capacitors and resistors are also used.

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 3

Clipper Circuits

Series Clipper Circuit

• First introduced as a half-wave rectifier for sinusoidal waveforms.

• Any type of signals that can be applied to a clipper i.e. Sinusoidal, Square, Triangular, sawtooth etc.

• In Series Positive Clipper, the diode is connected in series with the output in Reverse Biasing.

• In Series Negative Clipper, the diode is connected in series with the output in Forward Biasing.

• In Series Bias Clipper, a battery is connected with resistance

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 4

Series Positive Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 5

Series Negative Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 6

Biased Series Negative Clipper

Series Bias Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 7

Series Bias Clipper

Biased Series Positive Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 8

Also called Shunt Clipper

In parallel clipper, Output is in parallel with the diode & resistance.

Like series, there is also positive and negative shunt clipper as well as biased parallel clipper.

Parallel Clipper Circuits

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 9

Shunt Parallel Positive Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 10

Shunt Parallel Negative Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 11

Biased Shunt Positive Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 12

Biased Shunt Negative Clipper

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 13

If input, vi is sinusoidal and after 900, the capacitor is charged

by Vm

Then, I/p Voltage vi moves towards the –ve cycle, then diode is

reverse biased and in ideal case, capacitor cannot discharge,

Therefore Vc = Vm

By applying KVL,

Clamper Circuit without DC Voltage Source

Clamping shifts the entire signal voltage by a DC voltage level.

Here input signal is shifted by a DC level (here 0V); keeping peak-to-peak

value same Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 14

When I/P is shown polarity: Capacitor starts charging, Using KVL,

-VC - VB + vS = 0 VC = Vs– VB

When I/P polarity Changes: KVL equation

vO – vS + VC = 0 vO = vS – VC.

Here input signal is shifted by a DC level (VB); keeping peak-to-peak value same

Output for Sinusoidal and square inputs are shown.

Clamper circuit with DC voltage Source VB.

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 15

Thank you

Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 16

To see the video explanation, click here :

https://www.youtube.com/watch?v=2jrfPHPHv2Y