Made By :- Shivani Srivastava, binal Vaghela ENROLLMENT NO: -141080111004, 141080111005 SEM :-3rd branch :- E.C.

Topic :- Clippers

Clippers or limiters The clipping circuits using diodes have the ability to “clip “ off or remove a portion of the input signal without distorting the remaining part of the waveform. The diode clipper circuits can be of the following types :- 1] series clippers 2] parallel clippers

A series clipper circuits SERIES NEGATIVE CLIPPER :- The basic configuration of a series negative clipper is as shown in figure . D + vi (input ) R(load) vo (output ) _

Negative cycle is clipped off Waveforms :- vm on Negative cycle is clipped off

Operation :- The series negative clipper shown in figure is nothing but a simple half wave rectifier circuit . In the +ve half cycle of the sinusoidal input , the diode is forward biased diode . It acts as a closed switch and connects the load across the input .

The load voltage is therefore equal to the input voltage in the positive half cycle . In the negative half cycle of the input, the diode is reverse biased and acts as an open circuited switch. The load voltage is therefore zero during the negative half cycle . the negative half cycle is thus “clipped off “ by the series negative clipper .

SERIES POSITIVE CLIPPER :- The basic configuration of a series positive clipper as shown in figure :- D input voltage RL output voltage

POSTIVE CYCLE IS CLIPPED OFF Waveforms :- vm POSTIVE CYCLE IS CLIPPED OFF ON

Operation :- The series positive clipper shown in figure is nothing but a simple half wave rectifier circuit . In the +ve half cycle of the sinusoidal input , the diode is reversed biased diode . It acts as a open switch and connects the load across the input .

The load voltage is therefore equal to the input voltage in the positive half cycle . In the negative half cycle of the input, the diode is forward biased and acts as an closed circuited switch. The positive half cycle is thus “clipped off “ by the series positive clipper .

A parallel clipper circuits PARALLEL POSITIVE CLIPPER :- In the parallel clipper circuits , the clipping diode is connected in a branch which is parallel to the load as shown in figure . R input voltage D output voltage

Operation :- The parallel positive clipper shown in figure . In the +ve half cycle of the sinusoidal input , the diode is forward biased diode . It acts as a closed switch ,the output voltage will therefore be zero in the +ve half cycle .

In the negative half cycle of the input, the diode is reverse biased and acts as an open circuited switch. . the positive half cycle is thus “clipped off “ by the series positive clipper .

A parallel clipper circuits PARALLEL NEGATIVE CLIPPER :- In the parallel clipper circuits , the clipping diode is connected in a branch which is parallel to the load as shown in figure . R input voltage D output voltage

Operation :- The parallel negative clipper shown in figure . In the -ve half cycle of the sinusoidal input , the diode is forward biased diode . It acts as a closed switch ,the output voltage will therefore be zero in the -ve half cycle .

In the +ve half cycle of the input, the diode is reverse biased and acts as an closed circuited switch. . the negative half cycle is thus “clipped off “ by the series negative clipper .

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