Clipper Circuits MCQ Quiz - Objective Question with Answer for Clipper Circuits - Download Free PDF

Explanation:

Positive Clipper Circuit

Definition: A positive clipper is an electronic circuit designed to clip (or remove) the positive portions of an alternating waveform, ensuring that the output signal does not exceed a certain positive voltage level. This clipping action is achieved by using diodes and other components to control the voltage level at which clipping occurs.

Working Principle: The positive clipper circuit typically consists of a diode and a resistor. When an AC signal is applied to the input, the diode conducts only during the positive half-cycles of the input signal, thereby clipping the positive portion of the waveform to a predefined level. The output voltage thus remains at or below the clipping level during the positive half-cycles.

Circuit Configuration:

• Diode: The diode is connected in series with the input signal. During the positive half-cycle of the input signal, the diode becomes forward-biased and conducts, allowing the current to pass through. This action clips the positive half of the waveform.
• Resistor: The resistor is usually connected in series with the diode to limit the current and protect the diode from excessive current flow.
• Clipping Level: The clipping level can be adjusted by changing the orientation of the diode and by introducing a DC bias voltage in series with the diode.

Advantages:

• Simple design and easy to implement.
• Protects circuits from excessive positive voltage levels.
• Can be used to shape and modify waveforms in signal processing applications.

Disadvantages:

• Only clips the positive portion of the signal, leaving the negative portion unaffected.
• May introduce distortion in the signal if not designed properly.

Applications:

• Waveform shaping and modification in signal processing.
• Protecting sensitive electronic components from voltage spikes.
• In communication systems to maintain signal integrity.

Correct Option Analysis:

The correct option is:

Option 1: Positive clipper

This option correctly identifies the circuit as a positive clipper. The positive clipper removes or limits the positive portion of the input waveform, ensuring that the output signal does not exceed a certain positive voltage level. The key components, such as the diode and resistor, work together to clip the positive peaks of the input signal, making this the correct choice.

Additional Information

To further understand the analysis, let’s evaluate the other options:

Option 2: Biased clipper

A biased clipper is a type of clipper circuit that uses a DC bias voltage to adjust the clipping level. This circuit can clip either the positive or negative portions of the input signal at a specified bias voltage. While the biased clipper can be configured to clip the positive portion of the waveform, the circuit in question does not include a bias voltage, making this option incorrect.

Option 3: Clamper

A clamper is a different type of circuit that shifts the entire waveform up or down by adding a DC level to the input signal. Unlike clippers, clampers do not remove portions of the waveform but rather change its DC level. Since the circuit in question is designed to clip the positive portion of the waveform, the clamper option is incorrect.

Option 4: Negative clipper

A negative clipper is the opposite of a positive clipper. It clips the negative portion of the input signal, ensuring that the output signal does not exceed a certain negative voltage level. Since the circuit in question is designed to clip the positive portion of the waveform, the negative clipper option is incorrect.

Conclusion:

Understanding the differences between positive clippers, biased clippers, clampers, and negative clippers is essential for correctly identifying their operational characteristics. A positive clipper, as explained, involves clipping the positive portion of the input waveform, ensuring that the output signal does not exceed a certain positive voltage level. This simplicity in operation and design makes it suitable for specific applications, despite its limitations in only clipping the positive portion of the signal.

The basic clipper circuit consists of a resistor and a diode. The resistor limits the current flow through the diode, while the diode clips the input waveform to a specific level.

Series positive clipper

The diode is connected in series with the load, hence it is a series clipper.

In the output waveform, the positive part is clipped, hence it is a positive clipper.

Series negative clipper

Parallel positive clipper

Parallel negative clipper

The given circuit will clip both the positive and negative half of the output voltage. 

For ideal diodes the output waveform above would be zero. However, due to the forward bias voltage drop across the diodes the actual clipping point occurs at +0.7 volts and –0.7 volts respectively.

The circuit will act as a simple clipping circuit

Clipper circuit

Clipper circuits are the circuits that clip off or remove a portion of an input signal, without causing any distortion to the remaining part of the waveform. 

It is also known as the limiter circuit.

For the clipping of the input AC signal, a diode is used.

Based on the connection of the diode, the clipper is classified into the following types:

Series positive clipper

Series negative clipper

Parallel positive clipper

Parallel negative clipper

The following circuit is a series positive clipper.

Series positive clipper

The diode is connected in series with the load, hence it is a series clipper.

In the output waveform, the positive part is clipped, hence it is a positive clipper.

Series negative clipper

Parallel positive clipper

Parallel negative clipper

The following circuit is a series positive clipper.

Series positive clipper

The diode is connected in series with the load, hence it is a series clipper.

In the output waveform, the positive part is clipped, hence it is a positive clipper.

Series negative clipper

Parallel positive clipper

Parallel negative clipper

Clipper:

A clipper is a device that removes either the positive half (top half) or negative half (bottom half), or both positive and negative halves of the input AC signal.

The clipping (removal) of the input AC signal is done in such a way that the remaining part of the input AC signal will not be distorted

In the below circuit diagram, the positive half cycles are removed by using the series positive clipper.

Important Points

• In a clipper circuit, If the dc source is set to zero voltage, then the circuit acts as a rectifier.
• One of the basic clipping devices is the half-wave rectifier.
• A half-wave rectifier removes either the positive half cycle or negative half cycle of the input AC signal and allows the remaining half cycle of the input AC signal. So that a half-wave rectifier acts as a clipper circuit.
• A Clamper circuit can be defined as the circuit that consists of a diode, a resistor and a capacitor that shifts the waveform to the desired DC level without changing the actual appearance of the applied signal.

Concept:

When an anode of the diode is connected to the positive terminal of the battery, it is forward biased. In forward biased, the diode is replaced by short-circuited.

When an anode of the diode is connected to the negative terminal of the battery, it is reverse biased. In reverse biased, the diode is replaced by open-circuited.

Case 1: For a positive half-cycle

Diode ON

The output voltage (V_o) is:

V_o = 0 V

Case 2: For a negative half-cycle

Diode OFF

The output voltage (Vo) is:

Vo = V_i

The circuit clips the positive half of the input and the diode is connected in parallel to the load, therefore the circuit is said to be Shunt positive clipper.

Concept:

This circuit is a positive clipper circuit. It clips the positive peak of the output voltage

When Vi < V_R

The diode is OFF and Vi = V0

When Vi > V_R

The diode is ON and V0 = V_R

The positive peak of output voltage = V_R

The negative peak of output voltage = V_i

Calculation:

The given circuit is a positive clipper.

The positive peak of output voltage = 10 V

The negative peak of output voltage = -50 V

Clipper circuit

A clipper is a device that removes either the positive half (top half) or negative half (bottom half), or both positive and negative halves of the input AC signal.

A clipper circuit is called the limiter circuit.

The clipper circuit is of 4 types.

1.) Series positive clipper

2.) Series negative clipper

3.) Shunt-positive clipper

4.) Shunt negative clipper

Clamper circuit

A Clamper circuit is used for adding a DC shift to an AC signal.

It does not distort the shape of the signal but only shifts the amplitude of the signal.

It is also known as the DC inserter circuit.

Chopper circuit 

It is a power electronics circuit that is used to convert fixed DC into pulsating DC.

• A clipper is a device that removes either the positive half (top half) or negative half (bottom half), or both positive and negative halves of the input AC signal.
• The clipping (removal) of the input AC signal is done in such a way that the remaining part of the input AC signal will not be distorted
• In the below circuit diagram, the positive half cycles are removed by using the series positive clipper.

• In a clipper circuit, If the dc source is set to zero voltage, then the circuit acts as a rectifier.
• One of the basic clipping devices is the half-wave rectifier.
• A half-wave rectifier removes either the positive half cycle or negative half cycle of the input AC signal and allows the remaining half cycle of the input AC signal. So that a half-wave rectifier acts as a clipper circuit.
• A Clamper circuit can be defined as the circuit that consists of a diode, a resistor and a capacitor that shifts the waveform to the desired DC level without changing the actual appearance of the applied signal.

Clipper circuit

Clipper circuits are the circuits that clip off or remove a portion of an input signal, without causing any distortion to the remaining part of the waveform. 

It is also known as the limiter circuit.

For the clipping of the input AC signal, a diode is used.

Based on the connection of the diode, the clipper is classified into the following types:

Series positive clipper

Series negative clipper

Parallel positive clipper

Parallel negative clipper

If V_i > V₁  then D₁ is ON

V₀ = V₁

If V_i < -V₁ then D₂ is ON

V₀ = -V₁

If –V₁ < V_i < V₁ both diodes will be off:

 \({V_0} = \frac{{{V_i} \times {R_L}}}{{R + {R_L}}}\)

So it will work like dual clipper.

Output waveform:

1. Positive Clipper: A positive clipper removes that part of i/p signal which lies above reference voltage

Eg.

2. Negative Clipper: It removes that part of i/p signal which lies below reference voltage.

Eg.

3) Dual Clipper: Circuit which removes that part of i/p signal which lies above greater reference voltage and also which lies before smaller resistance.

Operational Amplifier :

A integrated circuit that can amplify the weak signals. It has 2 input pins ( Differential input) and one output pin.

Applications of Op-amp are: 

• Linear
• Non-Linear
• Wave Shaping

Clipper Cicuit:

To clip certain portion of waveform to get desired output waveform.

Clamper Circuit:

To add or substract DC level from input waveform.

Sample Hold Circuit:

The circuit which takes the samples of voltage and hold for certain period of time.

Schmitt Trigger:

A positive feedback circuit which add hysteresis to input-output transition.

Clipper Circuits:

A clipper is a device that removes either the positive half (top half) or negative half (bottom half), or both positive and negative halves of the input AC signal. The clipping (removal) of the input AC signal is done in such a way that the remaining part of the input AC signal will not be distorted.

The following types of clipper circuits are there:

• Series positive clipper: Diode is connected in series with the output.
• Series negative clipper: Diode is connected in series with the output.
• Shunt or parallel positive clipper: Diode is connected in parallel with the output.
• Shunt or parallel negative clipper: Diode is connected in parallel with the output.

Series positive clipper:

Series Negative Clipper:

Parallel positive clipper:

Parallel Negative clipper: