Diode Clipper Circuit By:Engr.Irshad Rahim Memon

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Presentation transcript:

Diode Clipper Circuit By:Engr.Irshad Rahim Memon PRACTICAL # 06 Diode Clipper Circuit By:Engr.Irshad Rahim Memon

OBJECTIVE Objective of this practical is to learn that how a diode can clip/limit the signal.

What are Diode limiter circuit ? Diode limiter circuits are usually used to limit the +ve and/or –ve input signal Positive diode limiter circuit is shown in figure 01(a) and negative diode limiter circuit is shown in figure 01(b). Input and output signal waveforms are also shown in figure 01.

Figure01(a) Positive limiter

Figure01(b) Negative limiter

Diode limiter circuit Continued… When positive input half cycle of voltage signal is applied to circuit as shown in figure 01(a); diode will be forward biased and it can drop only 0.7volt and remaining input voltage will be dropped across R1 When negative input half cycle of voltage signal is applied to circuit as shown in figure 01(a); diode will be reverse biased and it will appear as open switch, so input voltage will be dropped across series combination of R1 and RL.

Diode limiter circuit Continued… When negative input half cycle of voltage signal is applied to circuit as shown in figure 01(b); diode will be forward biased and it can drop only 0.7volt and remaining input voltage will be dropped across R1 When positive input half cycle of voltage signal is applied to circuit as shown in figure 01(b); diode will be reverse biased and it will appear as open switch, so input voltage will be dropped across series combination of R1 and RL

Coming Towards Objective now

Required Apparatus AC Source Diode Breadboard Multimeter Oscilloscope Connecting Wire etc.

Procedure Prepare the circuit on bread board as given in figure 01. Observe the input and output signal waveforms on oscilloscope.

Procedure Figure 01(a) Positive Limiter in Multism

Result on Oscilloscope of Fig01(a)

Procedure Figure 01(b) Negative Limiter in Multism

Result on Oscilloscope of Fig01(b)

OBSERVATION Input and output signal waveforms resemble with the waveforms as given in figure 01.

ANY QUERY ?