Mumbai University > Electronics Engineering > Sem 4 > Discrete Electronic Circuits

Marks: 5M

Figure 1 shows the clipper circuit diagram, Figure 2 shows the input waveform and Figure 3 shows the output waveform.

When Vin=0, diode is forward biased Vo=1.5V

During positive half cycle of ac input signal.

i. When Vin< 1.5V, diode is forward biased.

Vin+1.5V=Vo, i.e. Vo=0+1.5V=1.5V. As shown in Figure 3.

ii. When Vin> 1.5V, diode is forward biased.

Vin+1.5V=Vo, i.e. Vo=3V+1.5V=4.5V. As shown in Figure 3.

During negative half cycle of ac input signal.

i. When Vin<1.5V, diode is forward biased.

Vin+1.5V=Vo, i.e. Vo=-1+1.5V=0.5V. As shown in Figure 3.

ii. When Vin>1.5V, diode is reversed biased.

Vo=0V. As shown in Figure 3.

4) This type of clipper is called as biased series clipper where a dc voltage is applied to clip the waveform in positive or negative half cycle.