Fet amplifier viva questions in operating
Here we are going to list down the frequently most asked Electronics Design Interview Questions for professionals. The questions are created and submitted by professionals to help you to ace the job interviews. Vskills Certifications Why Vskills Search. Electronics Design Electronics Design Here we are going to list down the frequently most asked Electronics Design Interview Questions for professionals.
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- 300+ TOP FET Questions and Answers Pdf | MCQs
- 35+ Important MCQ on Transistor such as BJT, FET and MOSFET (With Answers)
- Know the Major Difference between BJT and FET
- Basic Electronics Questions for Interview
- MOSFET Interview Questions Part 1
- FET Amplifier Electrical Engineering (EE) Notes | EduRev
- FET-Amplifier Questions
- Terms of Service
300+ TOP FET Questions and Answers Pdf | MCQs
Inst Tools. What is a common Base amplifier? Common base amplifier is on in which the base terminal is common to both input and output circuit. Following are the some of the characteristic parameters of CB amplifier neglecting the output resistance of amplifier which accounts for early effect are.
What is a Common emitter amplifier? Common emitter amplifier is on in which the emitter terminal is common to both input and output circuit. Following are the some of the characteristic amplifiers of CE amplifier with emitter resistance neglecting the output resistance of amplifier which accounts for early effect are. What is a Common collector amplifier? Common collector amplifier is on in which the collector terminal is common to both input and output circuit. Following are the some of the characteristic amplifiers of CC amplifier are.
What are the applications of transistor amplifiers? It can be used as single stage or in cascade. It is used as high frequency amplifier combined with common emitter amplifier. Its low input resistance finds application in specific areas where the signal strengths are very low or when load on source should be very low.
It is used as output stage in multistage amplifier because of its low output resistance. What is Darlington pair? Darlington pair consists of two cascaded emitter followers used to achieve high input resistance. Darlington pair is a better buffer compared to single stage emitter follower circuit. The typical Darlington pair is shown below. Following are some of the characteristic parameters of Darlington pair. What is cascade amplifier? To meet given amplifier specifications two or more stages are cascaded in series, each stage can be identical or different.
Such amplifiers are called cascade amplifiers. Often amplifier with common emitter multi stages is referred to as Cascade amplifier. Explain cascade amplifier? Cascade amplifier is a Common base amplifier stage in cascade with common emitter stage. It combines the high resistance, large Transconductance high gain achieved in common emitter amplifier with the superior high frequency response of common base amplifier.
It is designed to achieve wider bandwidth but dc gain approximately equal o that of common emitter amplifier. What are interacting and non-interacting cascading stages? If in a cascade of stages the input impedance of one stage is low enough to act as an appreciable shunt on the output impedance of the preceding stage the output impedance of the preceding stage the stages are said to interacting stages. If in a cascade of stages the input impedance of one stage is high enough so that it will not be able to affect the output impedance of the preceding stage the stages are said to Non-interacting stages.
For n Non-interacting stages with each stage having lower and upper cut-off frequencies as fl, fh the upper and lower cut-off frequencies are given as follows. What is the upper cut-off for interacting stages? The upper cut-off frequency of n interacting stages with each stage having upper cut-off frequencies fh is.
Why amplifier gains will reduce at higher frequency? What are the types of coupling used in amplifiers? The term Coupling occurs in multi stage amplifiers and refers to the way in which the output of one stage is connected to the input of next stage. There are mainly three types of coupling which are. What is direct coupling?
A direct coupling is one in which the output of one stage of amplifier is connected to the input of second stage in such a way to allow even DC signals from one stage to another. The frequency response of the direct coupled amplifier is similar to low pass filter and is characterized by rise time.
The main disadvantage with DC coupling is, since there is no DC isolation the first stage acts as a biasing circuitry for the second stage, the AC signal current is superimposed on DC quiescent currents and this effect propagates.
What is capacitive coupling? A capacitive coupling is one in which the output of one stage of amplifier is connected to the input of second stage through a capacitor. This is the most frequently used coupling.
The coupling capacitor blocks DC signal propagation across the amplifier and allows only AC signals. This makes the circuit analysis and design simplified and each stage can be considered as isolated as far as DC signals are considered. Also it avoids the amplifiers going into DC saturation. What is transformer coupling amplifier? A Transformer coupling is one in which the output stage of one amplifier is coupled to the input stage of next amplifier through a transformer.
By choosing the appropriate turns ratio a transformer can be used to provide impedance matching with the load. Such coupling is used in high frequency amplification. Introduction of Transformer makes the amplifier bulkier and costly. It is shown in the figure below. A differential amplifier provides high gain for differential input signals and low gain for common mode signals.
Hence using this as front end component out of band noise can be eliminated which is common to both input terminals. The resistance in the emitter lead plays a crucial role in the functioning of differential amplifier. This resistance has to be high in order that the CMMR of differential amplifier to be high. Alternatively in the improvised versions of differential amplifiers a constant current source is kept in emitter lead to provide very high resistance Theoretically infinite.
What is the effect of degeneration resistance on CMMR? What is feedback amplifier? If a amplifier has feedback path exists from output to input then that amplifier is termed as Feedback amplifier.
Feed back is the parameter which quantifies the amount of feedback given in a feedback amplifier. What is negative and positive feedback? If feedback from output to input is given in such in a way that the introduction of feedback in the amplifier decreases the overall gain, then the feedback is termed as negative feedback. If feedback from output to input is given in such in a way that the introduction of feedback in the amplifier increases the overall gain, then the feedback is termed as positive feedback.
What are Advantages and disadvantages of Negative feedback? The main disadvantage of negative feedback is decrease in overall gain. The gain and feedback factor in an amplifier are often functions of frequency, so the feedback may lead to positive feedback. What is de-sensitivity factor? Desensitivity factor is defined as the factor with which the feedback desensitizes the gain.
It is also called as return difference. What is a loop gain in amplifier? Loop gain in amplifier is defined as the gain of feedback path from output to input. It is the product of loop gain and feedback factor in positive feedback amplifiers. In negative feedback amplifiers it is the negative product of loop gain and feedback factor. Differential amplifier BJT A differential amplifier provides high gain for differential input signals and low gain for common mode signals. Recommended Articles.
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35+ Important MCQ on Transistor such as BJT, FET and MOSFET (With Answers)
The actual input resistance of the FET itself is very high as it is a field effect device. This means that the source follower circuit is able to provide excellent performance as a buffer. The voltage gain is unity, although current gain is high. The input and output signals are in phase.
Know the Major Difference between BJT and FET
In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well:. The input impedance of a JFET is …………. When drain voltage equals the pinch-off-voltage, then drain current …………. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ………….. The input control parameter of a JFET is ……………. A common base configuration of a pnp transistor is analogous to ………… of a JFET. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ………. The pinch-off voltage in a JFET is analogous to ……….
Basic Electronics Questions for Interview
Solved examples with detailed answer description, explanation are given and it would be easy to understand. Here you can find objective type Electronic Devices FET Amplifiers questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided. You can easily solve all kind of Electronic Devices questions based on FET Amplifiers by practicing the objective type exercises given below, also get shortcut methods to solve Electronic Devices FET Amplifiers problems.
MOSFET Interview Questions Part 1
Electronics Engineering students need to face some Basic Electronics Questions whether they are preparing for an interview or viva voce. So, this article gives you few Basic Electronics Questions for Interview and other competetive exams. Generally, you need to refer a variety of books in order to cover the ocean of topics in Electronics. What is an ideal voltage source? Answer: A device with zero internal resistance.
FET Amplifier Electrical Engineering (EE) Notes | EduRev
This page describes Electronics questionnaire written by specialists in Electronics domain. This top 10 Electronics interview questions and answers will help interviewee pass the job interview for Electronics position with ease. This set of questions are very useful for passing interview for various electronics related job positions right from testing, design, installation etc. These questions are very useful as college viva questions also. Explain each. Question Explain function of zener diode and its one of the application used in electronic circuit. Answer Zener diode operates in reverse bias.
FET-Amplifier Questions
Inst Tools. What is a common Base amplifier? Common base amplifier is on in which the base terminal is common to both input and output circuit. Following are the some of the characteristic parameters of CB amplifier neglecting the output resistance of amplifier which accounts for early effect are.
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These types of devices allow a greater degree of control over their work. The major difference between BJT and FET is that in a field-effect transistor only majority charge carries flows, whereas in BJT both majority and minority charge carriers flow. The BJT is one type of transistor that uses both majority and minority charge carriers. The main function of this transistor is to amplify current. These transistors can be used as switches and amplifiers. The applications of BJTs involve a wide range that includes electronic devices like TVs, mobiles, computers, radio transmitters, audio amplifiers, and industrial control.
When drain voltage equals the pinch-off-voltage, then drain current …………. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ………….. A common base configuration of a pnp transistor is analogous to ………… of a JFET. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ………. The pinch-off voltage in a JFET is analogous to ………. If the gate of a JFET is made less negative, the width of the conducting channel……….
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