please explain me about clipping and clamping circuits?

Question

it is in diode uses

Answer 1

1) Clipping : clipping is nothing but the process of cutting / chopping off any desired amount of an AC signal / waveform.

for example, if u have a signal of 7 VAC, and u want to feed it to a system which accepts only 5 V signal, then clipper can be used to chop off excess 2 V. diodes can be used in Clipping.

where as,
2) Clamping is raising / adding / boosting the input signal by any desired voltage value.

Ex; consider an electrical systems accepts only 5 V as an i/p, but u have 3 V signals. By Clamping this i/p, u can raise it value to apparent 3+2=5 V value.

note: clam piing is no Amplifying.

Answer 2

Clipping And Clamping Circuits

Answer 3

Clipping is the process of making the output voltage constant after a certain voltage level. It is a device designed to prevent the output of a circuit from exceeding a paticular voltage level without distorting the remaining part of the applied waveform. Clamping is the process of adding a certain amount of dc throughtout the ac waveform. The result is a sinusoidal waveform that is shifted from the symmetric position about the x-axis to a different dc level. Both clipping and clamping circuits use the advantages of the unidirectional property of a diode. A basic clipper circuit requires resistors, diodes, and voltage sources to determine the level of clipping. A basic clamping circuit diodes, resistors and capacitors. The capacitor stores the dc factor of the input ac and acts as a dc source for the clamper.

Answer 4

These types of circuits use diodes to force the voltage at some node to a constant level if it exceeds a threshold. For example, consider a 5.4 volt Zener diode between some "input" node and ground. When the input voltage reaches or exceeds 5.4 V, the Zener Diode starts conducting and forces the node to remain at 5.4 V.

Answer 5

Clipping Circuit

The circuit with which the applied waveform is shaped by removing or clipping a portion of that wave is known as a clipping circuit. It is also known as a limiter.

Clippers find extensive application in radar, digital and other electronic systems.

Although several clipping circuits have been developed to change the wave shape, we shall confine our attention to diode clippers. These clippers can remove signal voltages above or below a specified level. The important diode clippers are :

1.)Positive Clipper
2.)Biased Clipper
3.)Combination Clipper

1.)Positive Clipper:
A positive clipper is that which removes the positive half-cycles of the input voltage.

2.)Negative Clipper
If it is desired to remove the negative half cycle of the input, the only thing to be done is to reverse the polarities of the diode in the circuit,Such a clipper is known as negative clipper.

3.)Biased Clipper
Sometimes, it is desired to remove a small portion of positive or negative half cycle of the signal voltage. For this purpose, biased clipper is used.

Biased Negative Clipper:

If it is desired to clip a portion of negative half cycle of input voltage, the only thing to be done is to reverse the polarities of diode or battery. Such a circuit is known as biased negative clipper.

Combination Clipper:

It is a combination of biased positive and negative clippers.

With a combination clipper, a portion of both positive and negative half cycles of input voltage, can be removed or clipped off.

Application of Clippers:

Clippers are used to perform one of the following two functions:

1.)Changing the shape of a waveform
2.)Circuit transient protection

Clamping Circuit:

A circuit that places either the positive or negative peak of a signal at a desired d.c. level is known as a clamping circuit.A clamping circuit or a camper essentially adds a d.c. component to the signal.The input signal is a sine wave having peak to peak value of 10 V.The clamper adds the d.c. component and pushes the signal upward so that the negative peaks falls on the zero level.It may be noted that the shape of the original signal has not changed; only there is a vertical shift in the signal. Such a clamper is known as positive clamper.The negative clamper dos the reverse i.e. it pushes the signal downwards so that the positive peaks falls on the zero level.

The following points may be noted carefully:

The clamping circuit does not change the peak-to-peak or r.m.s. value of the waveform.A clamping circuit changes the peak value and average value of a waveform.In the above circuit, it is easy to see that input waveform has a peak value of 5 V and average value over a cycle is zero. The clamped output varies between 10 V and 0 V. Therefore, the peak value of camped output is 10 V.

Positive Clamper:

The input signal is assumed to be a square wave with time period T.The clamped output is obtained across RL.The circuit design incorporates two main features. Firstly, the value of C and RL are so selected that time constant τ = C RL is very large.This means that voltage across the capacitor will not discharge significantly during the interval the diode is non-conducting.Secondly, RL C time constant is deliberately made much greater than the time period T of the incoming signal.

Operation:

During the negative half cycle of the input signal, the diode is forward biased.

Negative Clamper:

The clamped output is taken across RL. The only change from the positive clamper is that the connections of diode are reversed.

Operation

During the positive half cycle of the input signal, the diode is forward biased.The charging time constant ( = CRf) is very small so that the capacitor will charge to V volts very quickly.It can be seen that during this interval, the output voltage is directly across the short circuit.

Therefore, Vout = 0.

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Answer 6

clipping is nothing but cutting off or slicing,wehave two types of clippers i.e, series clipper ,shunt clipper .we use diodes to clip.
clamping meens setting the dc level of the reference voltage