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 .