Analog Electronics
Clipper and Clamper Circuits
Dr. R . K Saxena Professor, Electrical & Electronics Engineering Global Institute of Technology, Jaipur (Raj.) Unit1-Diode Circuits Clipper and Clamper Circuits
To see the video explanation, click here :
https://www.youtube.com/watch?v=2jrfPHPHv2Y
Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 2 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 Series Bias Clipper
Biased Series Negative 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 Parallel Clipper Circuits
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.
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 Clamper Circuit without DC Voltage Source Clamping shifts the entire signal voltage by a DC voltage level.
0 If input, vi is sinusoidal and after 90 , 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,
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 Clamper circuit with DC voltage Source VB.
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.
Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 15 Thank you
To see the video explanation, click here :
https://www.youtube.com/watch?v=2jrfPHPHv2Y
Dr R K Saxena, Prof-EED, Global Institute of Technology, Jaipur 16