Clippers and Clampers

Ajay Singh Raghuvanshi

Ajay Singh Raghuvanshi, IIITA 204/07/2023

CLIPPERS There are a variety of diode networks called

clippers that have the ability to “clip” off a portion of the input signal without distorting the remaining part of the alternating waveform.

Depending on the orientation of the diode, the positive or negative region of the input signal is “clipped” off.

Ajay Singh Raghuvanshi, IIITA 304/07/2023

CLIPPERS There are two general categories of

clippers: Series Clipper : The series configuration is

defined as one where the diode is in series with the load.

Parallel Clipper : The diode in a branch parallel to the load.

Ajay Singh Raghuvanshi, IIITA 404/07/2023

Series Clippers (Un-biased)The diode in a series clipper “clips” any voltage that does not forward bias it:•A reverse-biasing polarity•A forward-biasing polarity less than 0.7 V (for a silicon diode)

Ajay Singh Raghuvanshi, IIITA 504/07/2023

Biased Diode Series Clippers As in fig the direction of the diode suggests that

the signal vi must be positive to turn it on.

The dc supply further requires that the voltage v i be greater than V volts to turn the diode on.

Ajay Singh Raghuvanshi, IIITA 604/07/2023

Series Clippers When the diode is in the short-circuit state,

such as shown in Fig., the output voltage vo can be determined by applying Kirchhoff’s voltage law in the clockwise direction:

Ajay Singh Raghuvanshi, IIITA 704/07/2023

Series Clipper with voltage Source

Ajay Singh Raghuvanshi, IIITA 804/07/2023

Biased Series Clippers The negative region of the input signal is “pressuring” the diode into

the “off” state, supported further by the dc supply. In general, therefore, we can be quite sure that the diode is an

open circuit (“off” state) for the negative region of the input signal

Ajay Singh Raghuvanshi, IIITA 904/07/2023

Determine the o/p waveform

Ajay Singh Raghuvanshi, IIITA 1004/07/2023

Summary of Series Clipper Circuits

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Ajay Singh Raghuvanshi, IIITA 1104/07/2023

Parallel Clipper

Ajay Singh Raghuvanshi, IIITA 1204/07/2023

Determine the o/p

Ajay Singh Raghuvanshi, IIITA 1304/07/2023

Parallel Clippers Forward Diode

Ajay Singh Raghuvanshi, IIITA 1404/07/2023

Parallel Clippers Reversed Diode

Ajay Singh Raghuvanshi, IIITA 1504/07/2023

Summary of Parallel Clipper Circuits

Ajay Singh Raghuvanshi, IIITA 1604/07/2023

ClamperThe clamping network is one that will “clamp” a signal to a different dc level. The network must have a capacitor, a diode, and a resistive element, but it can also employ an independent dc supply to introduce an additional shift.

Ajay Singh Raghuvanshi, IIITA 1704/07/2023

Biased Clamper Circuits

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The input signal can be any type of waveform such as sine, square, and triangle waves.

The DC source lets you adjust the DC camping level.

Ajay Singh Raghuvanshi, IIITA 1804/07/2023

Ajay Singh Raghuvanshi, IIITA 1904/07/2023

2004/07/2023

Summary of Clamper Circuits

Ajay Singh Raghuvanshi, IIITA

Ajay Singh Raghuvanshi, IIITA 2104/07/2023

Voltage-Multiplier Circuits

Voltage Doubler Voltage Tripler Voltage Quadrupler

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Voltage multiplier circuits use a combination of diodes and capacitors to step up the output voltage of rectifier circuits.

Ajay Singh Raghuvanshi, IIITA 2204/07/2023

VOLTAGE-MULTIPLIER CIRCUITS Voltage-multiplier circuits are employed to

maintain a relatively low transformer peak voltage while stepping up the peak output voltage to two, three, four, or more times the peak rectified voltage.

Ajay Singh Raghuvanshi, IIITA 2304/07/2023

Voltage Doubler Half wave

Ajay Singh Raghuvanshi, IIITA 2404/07/2023

Voltage Doubler Full wave

Ajay Singh Raghuvanshi, IIITA 2504/07/2023

Voltage Tripler and Quadrupler

Ajay Singh Raghuvanshi, IIITA 2604/07/2023

Practical Applications of Diode Rectifier Circuits

Conversions of AC to DC for DC operated circuits

Power supplies and Battery Charging Circuits Clipper , Clamper and Voltage multiplier

Wave shaping for signal analysis To get voltage transformation without use of

transformers Some other simple diode applications

Protective Circuits against Over current Protection against Polarity Reversal Protects against Currents caused by an inductive

kick in a relay circuit