Design a clipper and clamping circuit & study the output wave shapes.

Design a clipper and clamping circuit & study the output wave shapes.

1. OBJECTIVE:- Design a clipper and clamping circuit & study the output wave shapes.

2. A ci r cui t which us e t o r e m o v e the pea k o f the wave is called clipper. Here blue wave is input and red is output

3. Why Clipper used? Th e purpo s e o f clippe r s i s t o p r o t ec t a ci r cui t against too high or too low voltages. A simplest clipper circuit is consist of one diod e on e r e s i st a nc e and a A C inp u t s o u r ce .

4. Positive Clipper Circuits In a positive clipper, the positive half cycles of the input voltage will be removed. The circuit arrangements for a positive clipper are illustrated in the figure given below .

5. Negative Clipper Circuit The negative clipping circuit is almost same as the positive clipping circuit, with only one difference. If the diode in figures (a)and (b) is reconnected with reversed polarity, the circuits will become for a negative series clipper. As below

6. Result of Positive and Negative Clipper In all the above discussions, the diode is considered to be ideal one. In a practical diode, the breakdown voltage will exist (0.7 V for silicon and 0.3 V for Germanium). When this is taken into account, the output waveforms for positive and negative clippers will be of the shape shown in the figure below.

7. Biased Positive Clipper We know that the biasing is a process in which we connect a battery with the diode. Same as here we just attach battery with diode in clipper circuit. when the input signal voltage is positive, the diode ‘D’ is reverse-biased. This causes it to act as an open-switch.

8. Biased Negative Clipper When the input signal voltage is negative its also reverse biased but in this case battery voltage is more than the input voltage so its acts like an close switch.

9. Combination Circuit When a portion of both positive and negative of each half cycle of the input voltage is to be clipped (or removed), combination clipper is employed. The circuit for such a clipper is:

10. Cla m p e r A circuit which adds DC value to an AC wave form without changing its wave form. In this circuit we use a diode and a capacitor and a resistor for measure voltage in our circuit.

11. Why Clamper use Clamper use to increase the wavelength of input wave. Like an sound system amplifier.

12. Positive clamper In positive clamper diode is forward biased and current flow is maximum and so due to the capacitor it will double the wavelength on positive side.

13. Negative clamper In this capacitor negatively charged and the output is the double of the input of the negative side.