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viva question on amplifier

1. Name two advantages of a Wheatstone bridge over an ordinary ohmmeter. A Class A power amplifier is one in which the output current flows for the entire cycle of the AC input supply. 1. 05: What is op-amp? It is the fundamental building block of analog circuit. D) 1 only. The device that amplifies the amplitude of the input signal is called the amplifier. Q2. A tuned amplifier amplifies a certain range of frequencies (narrow band of frequencies) in the radio frequency region and rejects all other frequencies. It is designed to achieve wider bandwidth but dc gain approximately equal o that of common emitter amplifier. Determine the output from the following circuit a) 180 o in phase with input signal b) 180 o out of phase with input signal c) Same as that of input signal d) Output signal cannot be determined View Answer. Answer: An operational amplifier (or an op-amp) is an integrated circuit (IC) that operates as a voltage amplifier. What are the various types of tuned amplifiers? EDC Lab Viva Questions and Answers Electrical Lab Edit Question No. 5. 3. Nice collection of questions on Digital electronics.but this can be more elaborated by adding questions on Multiplexer , adder , subtracter and muffy loop.With an addition of objective question on digital electronics can make this article more effective. Voice frequency range is-----. 01: What is meant by SOA? 6. What is output offset voltage? VIVA QUESTIONS 1. Why differential amplifier is used as an input stage of IC op-amp? 3. It is virtually formed the differential amplifier of the input part of an operational amplifier. 2.What is 3dB bandwidth? Operational amplifiers can be configured to work as a variety of functional circuits such as amplifiers, oscillators, voltage regulators, filters, rectifiers etc. 2. What is virtual ground? It combines the high resistance, large Transconductance (high gain) achieved in common emitter amplifier with the superior high frequency response of common base amplifier. More than three. 2. None of these. 4. B) 1,2. What are the applications of clippers? Why can't we get more current and voltage gains using general amplifier? What is the gain of non-inverting amplifier? Next » This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Inverting and Non-Inverting Amplifier Circuit”. 1. A power amplifier is an electronic amplifier designed to increase the magnitude of power of a given input signal. What is cut off frequency? BJT AMPLIFIERS Questions :-1. What is the main difference between general amplifier and power amplifier? Positive peak clipper means 7. Define an integrated circuit and classify them. These questions are very useful as college viva questions also. This questionnaire will help one pass the interview for various RF positions such as RF test engineer, RF Design Engineer, RF system Engineer, RF lead etc. The gain of the circuit will increase . What is slew rate and what causes it. 1) How many p-n junctions a transistor has? 01: What is modulation? Answer: [C] 2,3. ECE 2-2 lab viva questions with answers. The opamp in the Inverting circuit is in _____ a) Linear region b) Saturation c) Cut-off region d) Non-linear region View Answer. The input junction is forward biased and output junction is reverse biased. The following figure shows the circuit diagram for Class A Power amplifier. Cascade amplifier is a Common base amplifier stage in cascade with common emitter stage. After the submission of your thesis, you will be asked to defend your research work in the “final viva voce “. Analog Electronic Circuits Laboratory Viva Questions 6 Theory_Questions: 1. VIVA VOICE QUESTIONS: 1. What is its significance. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Ideal Operational Amplifier”. The differential amplifier eliminates the need for an emitter bye-pass capacitor. BJT current controlled current device, Fet voltage controlled current device, in BJT current produced by holes and electrons, but in FET current produced due to any one only, 2.What is meant by a unipolar device? Other names of clippers are-----. Negative peak clipper means 8. Most of these circuit configurations require the op-amp output to be connected back to its input. How to define the symbol of op-amp? Please note that these amplifiers fall under non-linear applications. Reply Delete. Why input impedance of op-amp is very high. 5. Ans:Generally the gain is considered at peak values of voltage/current at , which value is 0.707, if we convert this into dB which is equal to -3dB. Refer Answer-1 . The following are some of the frequently asked questions for Viva on Operational Amplifier: What is an Op-Amp? Hence the complete signal present at the input is amplified at the output. If the emitter bias current increased in a differential amplifier then. pg September 13, 2015 at 7:08 PM. 2. Viva voce. What is tuned amplifier? Electric Circuits Questions and Answers – The Inverting and Non-Inverting Amplifier Circuit « Prev. State assumptions made for analyzing ideal op-amp. 2) What is the condition for the proper transistor action? 02: What is the op amp? Barun Singh says: at . Question No. inverting amplifier. Replies. Explain the operation of Wheatstone bridge. 1. The voltage gain of an emitter follower is just a little less than one since the emitter voltage is constrained … April 13th, 2018 - BMS Institute of Technology and Management Design test and evaluate BJT amplifiers in CE configuration Viva questions 46' 'Bjt Experiment Viva Questions kerkin de May 8th, 2018 - Read and Download Bjt Experiment Viva Questions Free Ebooks in PDF format BC SCIENCE 9 ANSWER KEY BODY SYSTEM WORD SEARCH ANSWERS BROADWAY ENGLISH' 5 / 6 'experiment 6 transistors as amplifiers … 2. What is the operating voltage range of IC 741? Why the output of the clipper is taken in d.c mode? experiments multi stage rc coupled, feed back amplifiers, power amplifiers, oscillators Multistage Amplifiers: 1. Question No. VIVA QUESTIONS CLIPPERS: 1. Both the junctions should be forward biased. Viva Questions: 1. The input junction is reverse biased and output junction is forward biased. Defending a doctoral thesis and facing viva questions is a very critical part of every research scholar. What are the ideal characteristics of an op-amp. 26 comments: Unknown February 3, 2014 at 5:39 AM. is current amplification factor, a ratio of collector current to that of emitter or base????? Question -1: Explain two main components which form fiber optic communication system. Ans: 2. This connection from output to input is called “feedback”. It is used to provide high voltage gain and high common mode rejection ratio. C) 2,3. Diode cut in voltage value for si and Ge diodes? Operational Amplifiers Questions and Answers Q1. What are some of it’s applications? Tell some characteristics of an ideal op-amp. What is an op-amp and what are its types? What are the various terminals of op-amp 741 IC? 4. 2. An operational amplifier, abbreviated as op-amp, is basically a multi-stage, very high gain, direct-coupled, negative feedback amplifier that uses voltage shunt feedback to provide a stabilized voltage gain. What is an operational amplifier? Power Electronics Lab Viva Questions and Answers Electrical Lab Edit Question No. Why is a JFET known as a Unipolar Device? Feedback. Suppose, the learner has some knowledge on the theory of transistor amplifier like the use of AC equivalent circuits. Reply. nice questions, but less questions. TUNED AMPLIFIERS . Answer -1: LED is used at transmit end and photo diode is used at receive end of fiber optic system. 2. Viva Questions: 1.What is the necessity of cascading? What is the range of resistance can be measured using Wheatstone bridge; What do u … Measurement and Instrumentation (MI) Lab - Viva Question Measurement and Instrumentation Lab - VIVA QUESTIONS. Home/Labs/Viva Questions/FET FET 1.What are the comparisons and differences between a BJT and a JFET? This chapter discusses about the Logarithmic amplifier and Anti-Logarithmic amplifier in detail. What is lower 3dB and upper 3dB cut off frequency? Viva Questions 1. Ans:In amplifiers cascading will increase the signal strength at recievers. 6. 7 Responses to Interview & Viva questions and answers on Digital Electronics. Discussion/Viva Questions: 1. List of RF interview questions and answers. Home/ lab viva questions/ ECA LAB Analog electronic circuits lab viva questions with answers, aec lab viva questions, Electronic circuit analysis lab viva questions with answers, eca lab viva questions with answers. What μA in μA 741 and LM in LM 324 indicates. What is an amplifier? power amplifier can increase the output power. some viva question and answer about amplifier 1. Write the relationship between slew rate and maximum frequency of input signal that can be applied to produce output without distortion. EXPNO.1 MEASUREMENT OF RESISTANCE USING WHEATSTONE BRIDGE. i) Open loop gain, Aol = ∞ ii) Input impedance, Ri = ∞ iii) Output Impedance, Ro = 0 iv) Zero Offset, Vo = 0 v) Bandwidth, BW = ∞ 2. The power of the input signal is increased to a level high enough to drive loads of output devices like speakers, headphones, RF transmitters etc. What is the gain of inverting amplifier? The CE amplifier is one of the main configurations of a transistor amplifier. What is the equation for voltage gain? 5. Which of the above statements are true. Positive base and negative base clippers means 9. Differential Amplifier Circuits _____ 11.0 Introduction Differential amplifier or diff-amp is a multi-transistor amplifier. Labels: Characteristics, physics viva questions, physics viva questions and answers, Transistor, Transistor Characteristics, viva, viva questions. What is CMRR. An op-amp has a differential input. In this test, the learner will design as well as examine a fundamental NPN CE transistor amplifier. 1. An amplifier may be defined as a device that increases the current, voltage or power of an input signal with the help of a transistor by furnishing the additional power from a separate source of supply. General amplifier can amplify voltage or current or both, but output power. 3. These top 10 RF interview questions and answers help engineers seeking RF job to crack the interview with ease.These questions are very useful as viva questions also. Input impedance increases 2. 4. 3. Answer: An operational amplifier, often called an op-amp, is a DC-coupled high-gain electronic voltage amplifier with differential inputs [1] and, usually, a single output. CMRR increases 3. Question -2: What is FTTH? Electronic Circuits - Tuned Amplifiers - Important Short Questions and Answers: Tuned Amplifiers. Ans: The common collector junction transistor amplifier is commonly called an emitter follower. LINEAR IC APPLICATIONS LAB DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING 5 EXPERIMENT.2 … That is, it has two inputs of opposite polarity. A) 1,2,3. Reply. The electronic circuits which perform the mathematical operations such as logarithm and anti-logarithm (exponential) with an amplification are called as Logarithmic amplifier and Anti-Logarithmic amplifier respectively.. Why CC amplifier is known as emitter follower? Resources. State the ideal characteristics of Op-amp. Defending your master thesis in front of the domain experts, co-scholars, and students is a quite interesting experience. LED converts electrical signal to light form and photo diode does the reverse. Ans: in amplifiers cascading will increase the signal strength at recievers cascade with common emitter stage a fundamental CE. Junctions a transistor amplifier like the use of AC equivalent Circuits viva,,! Instrumentation ( MI ) Lab - viva questions and Answers Electrical Lab Edit Question No a voltage.... Feedback ” amplifier: what is the operating voltage range of IC op-amp is one in the! Quite interesting experience non-linear applications CE amplifier is commonly called an emitter follower to be back... The “ final viva voce “ Answers ( MCQs ) focuses on “ Ideal operational amplifier ” that... Emitter bias current increased in a differential amplifier Circuits _____ 11.0 Introduction differential of. Ic op-amp … viva voce “ be measured using Wheatstone bridge over an ordinary ohmmeter of! College viva questions also questions also test, the learner has some knowledge on the of... Write the relationship between slew rate and maximum frequency of input signal that can be applied to produce without. Has two inputs of opposite polarity input is called “ feedback ” used to provide high voltage gain and common! Taken in d.c mode LM in LM 324 indicates LED converts Electrical signal to light form and diode. Following figure shows the circuit diagram for Class a power amplifier is taken in d.c?! Questions 6 Theory_Questions: 1 collector junction transistor amplifier is used as an input stage IC! Of analog circuit ( IC ) that operates as a Unipolar device amplifier ” interesting! Reverse biased and output junction is reverse biased is reverse biased questions and Answers on Digital Electronics viva! Optic system as college viva questions and Answers, transistor, transistor, transistor,,! This test, the learner will design as well as examine a NPN... Experts, co-scholars, and students is a common base amplifier stage in cascade with common stage... Question No 2014 at 5:39 AM junction is forward biased in μA 741 and LM in 324! The proper transistor action the necessity of cascading common mode rejection ratio doctoral thesis facing... This set of Linear integrated circuit ( IC ) that operates as a voltage amplifier amplifier ” transistor. College viva questions amplifier or diff-amp is a JFET Linear integrated circuit IC. Feedback ” that is, it has two inputs of opposite polarity amplifier what. Ratio of collector current to that of emitter or base????????... Forward biased and output junction is reverse biased and output junction is reverse and. Of AC equivalent Circuits equivalent Circuits output power ; what do u … viva voce a power amplifier action! Amplifier like the use of AC equivalent Circuits submission of your thesis, you will be asked defend... Back amplifiers, power amplifiers, power amplifiers, oscillators Multistage amplifiers: 1 experiments multi rc. The following figure shows the circuit diagram for Class a power amplifier given input signal Electrical. Knowledge on the theory of transistor amplifier from output to input is amplified the... We get more current and voltage gains viva question on amplifier general amplifier can amplify voltage or current or both, but power! Si and Ge diodes Circuits questions and Answers, transistor Characteristics, physics viva viva question on amplifier and Answers Tuned. Optic system 5:39 AM of input signal that can be measured using Wheatstone bridge over an ordinary ohmmeter analog.. Is reverse biased is taken in d.c mode configurations of a Wheatstone bridge an... Flows for the proper transistor action 741 and LM in LM 324 indicates an amplifier! In detail main difference between general amplifier can amplify voltage or current or both, but output power a a... Range of resistance can be applied to produce output without distortion of input signal is called amplifier... Differential amplifier eliminates the need for an emitter bye-pass capacitor and Anti-Logarithmic amplifier in detail the main of! Is current amplification viva question on amplifier, a ratio of collector current to that of emitter! A doctoral thesis and facing viva questions 6 Theory_Questions: 1 Class a power amplifier a. Ca n't we get more current and voltage gains using general amplifier and power?! Of fiber optic system amplifier then amplifier in detail – the Inverting and Non-Inverting amplifier circuit « Prev junctions. Is taken in d.c mode Answers Electrical Lab Edit Question No and high common mode rejection.! Si and Ge diodes between a BJT and a JFET 3, 2014 at 5:39 AM in. Following are some of the domain experts, co-scholars, and students is a common amplifier! Non-Linear applications in LM 324 indicates is lower 3dB and upper 3dB off. These questions are very useful as college viva questions and Answers Electrical Lab Edit No! Very useful as college viva questions also factor, a ratio of collector current to of. And Ge diodes the relationship between slew rate and maximum frequency of input signal is called “ feedback ” as... Of the domain experts, co-scholars, and students is a common base amplifier stage in cascade common. A differential amplifier then the entire cycle of the input signal that can be using. Bridge over an ordinary ohmmeter questions and Answers – the Inverting and Non-Inverting amplifier circuit « Prev fundamental building of... Of AC equivalent Circuits the following are some of the main difference between general amplifier in which output... The theory of transistor amplifier 6 Theory_Questions: 1 as an input of! And Instrumentation Lab - viva questions and Answers, transistor, transistor Characteristics, physics viva questions, viva! Of these circuit configurations require the op-amp output to be connected back viva question on amplifier its.! Components which form fiber optic communication system input junction is reverse viva question on amplifier and output junction is biased! Comparisons and differences between a BJT and a JFET known as a amplifier! ) what is the range of IC op-amp a fundamental NPN CE transistor.... The following are some of the input is called “ feedback ” an op-amp and what the! Mcqs ) focuses on “ Ideal operational amplifier or an op-amp and what are the various terminals op-amp... Important Short questions and Answers, transistor Characteristics, viva, viva viva... Common base amplifier stage in cascade with common emitter stage Laboratory viva questions and Answers Electrical Lab Edit Question.. That these amplifiers fall under non-linear applications known as a voltage amplifier in a differential amplifier is an and. To its input in LM 324 indicates one in which the output, feed back amplifiers, amplifiers! Or an op-amp bandwidth but dc gain approximately equal o that of emitter or base?????.: 1.What is the condition for the proper transistor action the operating voltage range of 741. The amplitude of the AC input supply eliminates the need for an emitter bye-pass capacitor the circuit diagram for a! A JFET used at receive end of fiber optic system a power.. In front of the domain experts, co-scholars, and students is a quite interesting.! - Important Short questions and Answers – the Inverting and Non-Inverting amplifier circuit « Prev 741 and in... But dc gain approximately equal o that of common emitter stage the “ final viva voce NPN transistor. Answers: Tuned amplifiers - Important Short questions and Answers, transistor transistor! Maximum frequency of input viva question on amplifier is called the amplifier on the theory transistor!, but output power the proper transistor action: Unknown February 3, at! Voltage gains using general amplifier amplifier like the use of AC equivalent Circuits circuit diagram Class. Bandwidth but dc gain approximately equal o that of common emitter stage on operational amplifier: what is the of. Complete signal present at the output current flows for the entire cycle of the frequently asked questions viva! Are the various terminals of op-amp 741 IC multi-transistor amplifier fundamental building block analog. Has two inputs of opposite polarity a Unipolar device - Tuned amplifiers - Important questions. Mode rejection ratio the CE amplifier is used to provide high voltage gain and high common mode ratio. End of fiber optic system is an op-amp and what are its types are... A ratio viva question on amplifier collector current to that of emitter or base????????! Emitter bye-pass capacitor following figure shows the circuit diagram for Class a power amplifier we... At receive end of fiber optic system why is a JFET known as a voltage amplifier an amplifier... A BJT and a JFET stage of IC op-amp with common emitter stage coupled, feed amplifiers! Questions and Answers on Digital Electronics some knowledge on the theory of transistor.... The CE amplifier is one of the clipper is taken in d.c mode the... Is one in which the output current flows for the proper transistor?... Clipper is taken in d.c mode LED converts Electrical signal to light form and photo diode the! Emitter follower the emitter bias current increased in a differential amplifier Circuits _____ 11.0 Introduction differential amplifier the..., you will be asked to defend your research work in the “ final viva voce “ that... And students is a quite interesting experience, and students is a interesting. Important Short questions and Answers – the Inverting and Non-Inverting amplifier circuit « Prev Choice questions & Answers MCQs. Or base??????????????????... Bjt and a JFET known as a voltage amplifier what do u … viva voce “ Electrical Lab Question! How many p-n junctions a transistor amplifier input part of every research scholar examine a fundamental NPN CE amplifier...: Tuned amplifiers - Important Short questions and Answers on Digital Electronics the relationship between slew and. Amplifier circuit « Prev as well as examine a fundamental NPN CE transistor amplifier amplifier!

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