What are the disadvantages of amplifier?

What are the disadvantages of amplifier?

It has a tendency to become noisy with age especially in moist climate. The voltage gain reduces at low as well as high frequencies. It provides poor impedance matching and hence it cannot be used as a final stage of an amplifier.

What is meant by multistage amplifier?

A multistage amplifier is an electronic amplifier consisting of two or more single-stage amplifiers connected together. In this context, a single stage is an amplifier containing only a single transistor (sometimes a pair of transistors) or other active device.

What is the name of multistage amplifier?

A multistage amplifier using two or more single stage common emitter emitter amplifier is called as cascaded amplifier. A multistage amplifier with common emitter as the first stage and common base as second stage is called cascode amplifier.

What is a multistage amplifier what are the different methods of coupling?

In Multi-stage amplifiers, the output of first stage is coupled to the input of next stage using a coupling device. These coupling devices can usually be a capacitor or a transformer. This process of joining two amplifier stages using a coupling device can be called as Cascading.

What are the advantages of multistage amplifier?

The advantages of the multistage amplifier are flexibility within input & output impedance and higher gain. The multistage amplifier applications are, it can be used to increase extremely weak signals to utilizable levels. The distortion can be reduced by changing the signal within stages.

What are the advantages and disadvantages of amplifiers?

Advantages and disadvantages of negative feedback amplifiers

• The negative feedback reduces the size.
• It has highly stabilized gain.
• It has fewer harmonics distortion.
• It has less phase distortion.
• It has higher fidelity.
• More linear operation.
• It has less frequency distortion.
• Input-output impedances can be modified as desired.

What are the classification of multistage amplifier?

Depending upon the type of coupling, the multistage amplifiers are classified as: 1. Resistance and Capacitance Coupled Amplifiers (RC Coupled) 2. Transformer Coupled Amplifiers 3.

Which of the multistage amplifiers has poor frequency response?

This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Multistage Amplifier”. Explanation: The transformer coupling has a poor frequency response. The gain varies considerably with frequency.

What are the drawbacks of directed multistage amplifier?

Disadvantages: cannot amplify high frequency signal. poor temperature stability.

What are the advantages and disadvantages of cascading gain stages?

The configuration of this amplifier mainly include some advantages like less input resistance, moderate to high current gain, voltage as well as high o/p resistance. The main drawback of the cascade amplifier is when several stages increases then the bandwidth will decrease.

What are the advantages of amplifier?

Advantages of a negative feedback amplifier:

• The negative feedback reduces the size.
• It has highly stabilized gain.
• It has fewer harmonics distortion.
• It has less phase distortion.
• It has higher fidelity.
• More linear operation.
• It has less frequency distortion.
• Input-output impedances can be modified as desired.

Which of the following is the drawback of multistage amplifier?

What are the advantages of a multistage amplifier?

The current gain of this amplifier is equivalent to the product of the current gain result of separate stages The advantages of the multistage amplifier are flexibility within input & output impedance and higher gain. The multistage amplifier applications are, it can be used to increase extremely weak signals to utilizable levels.

How are amplifiers connected in a multistage cascade?

The voltage gain or current gain obtained from single transistor amplifier is usually not sufficient for most of the applications. Hence several amplifier stages are connected in cascade. i.e connected such that the output of one stage forms input of the next stage. Such multistage amplifiers provide desired voltage or current gain.

Why do you need a capacitor in a multi stage amplifier?

The capacitor C e connected at the emitter of Q 1 and Q 2 are needed because they bypass the emitter to ground. When an A.C signal is applied to the input of the first stage, it is amplified by a transistor and appears across the collector resistor (R c ). This signal is given to the input of second stage, through coupling capacitor C c.

How does the second stage of an amplifier work?

The second stage does further amplification of the signal. In this way, the cascaded stages amplify the signal and the overall gain is equal to product of the individual stage gains. The frequency response of an amplifier is a graph, which indicates the relationship between the voltage gain and frequency of input signal.