Write the relationship between slew rate and maximum frequency of input signal that can be applied to produce output without distortion. 7 Responses to Interview & Viva questions and answers on Digital Electronics. ECE 2-2 lab viva questions with answers. Labels: Characteristics, physics viva questions, physics viva questions and answers, Transistor, Transistor Characteristics, viva, viva questions. Why the output of the clipper is taken in d.c mode? i) Open loop gain, Aol = ∞ ii) Input impedance, Ri = ∞ iii) Output Impedance, Ro = 0 iv) Zero Offset, Vo = 0 v) Bandwidth, BW = ∞ 2. It is the fundamental building block of analog circuit. Question No. 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. More than three. After the submission of your thesis, you will be asked to defend your research work in the “final viva voce “. What is cut off frequency? Replies. It combines the high resistance, large Transconductance (high gain) achieved in common emitter amplifier with the superior high frequency response of common base amplifier. What is its significance. Please note that these amplifiers fall under non-linear applications. State assumptions made for analyzing ideal op-amp. 4. Positive base and negative base clippers means 9. Why input impedance of op-amp is very high. 3. It is designed to achieve wider bandwidth but dc gain approximately equal o that of common emitter amplifier. What is the main difference between general amplifier and power amplifier? Tell some characteristics of an ideal op-amp. How to define the symbol of op-amp? Input impedance increases 2. 2. If the emitter bias current increased in a differential amplifier then. Both the junctions should be forward biased. Question No. 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. 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. Why is a JFET known as a Unipolar Device? power amplifier can increase the output power. What is slew rate and what causes it. What is tuned amplifier? General amplifier can amplify voltage or current or both, but output power. In this test, the learner will design as well as examine a fundamental NPN CE transistor amplifier. 26 comments: Unknown February 3, 2014 at 5:39 AM. None of these. What are the ideal characteristics of an op-amp. B) 1,2. The input junction is forward biased and output junction is reverse biased. C) 2,3. 1. 2. 3. Electronic Circuits - Tuned Amplifiers - Important Short Questions and Answers: Tuned Amplifiers. 3. What is an op-amp and what are its types? Voice frequency range is-----. 4. Most of these circuit configurations require the op-amp output to be connected back to its input. The gain of the circuit will increase . 4. 6. Power Electronics Lab Viva Questions and Answers Electrical Lab Edit Question No. The following are some of the frequently asked questions for Viva on Operational Amplifier: What is an Op-Amp? What is CMRR. 5. 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.. 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. Next » This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Inverting and Non-Inverting Amplifier Circuit”. It is virtually formed the differential amplifier of the input part of an operational amplifier. This connection from output to input is called “feedback”. Viva Questions: 1.What is the necessity of cascading? 1. A) 1,2,3. What are the various terminals of op-amp 741 IC? TUNED AMPLIFIERS . VIVA QUESTIONS 1. CMRR increases 3. experiments multi stage rc coupled, feed back amplifiers, power amplifiers, oscillators Multistage Amplifiers: 1. Viva Questions: 1. Reply. Viva Questions 1. The CE amplifier is one of the main configurations of a transistor amplifier. EXPNO.1 MEASUREMENT OF RESISTANCE USING WHEATSTONE BRIDGE. Defending a doctoral thesis and facing viva questions is a very critical part of every research scholar. Define an integrated circuit and classify them. Reply Delete. An op-amp has a differential input. What is the equation for voltage gain? Suppose, the learner has some knowledge on the theory of transistor amplifier like the use of AC equivalent circuits. Viva voce. EDC Lab Viva Questions and Answers Electrical Lab Edit Question No. 6. 3. Which of the above statements are true. Why can't we get more current and voltage gains using general amplifier? Ans:In amplifiers cascading will increase the signal strength at recievers. A Class A power amplifier is one in which the output current flows for the entire cycle of the AC input supply. What are some of it’s applications? 5. State the ideal characteristics of Op-amp. Feedback. 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 … pg September 13, 2015 at 7:08 PM. What is the gain of inverting amplifier? 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. 02: What is the op amp? 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. BJT AMPLIFIERS Questions :-1. Analog Electronic Circuits Laboratory Viva Questions 6 Theory_Questions: 1. 2. Answer -1: LED is used at transmit end and photo diode is used at receive end of fiber optic system. 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. Barun Singh says: at . 2. What are the applications of clippers? What is virtual ground? Ans: 2. The following figure shows the circuit diagram for Class A Power amplifier. 1) How many p-n junctions a transistor has? What is an amplifier? Defending your master thesis in front of the domain experts, co-scholars, and students is a quite interesting experience. List of RF interview questions and answers. The input junction is reverse biased and output junction is forward biased. Resources. 01: What is modulation? What is lower 3dB and upper 3dB cut off frequency? What μA in μA 741 and LM in LM 324 indicates. Q2. 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. 2.What is 3dB bandwidth? 1. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Ideal Operational Amplifier”. VIVA QUESTIONS CLIPPERS: 1. 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. What is the gain of non-inverting amplifier? A power amplifier is an electronic amplifier designed to increase the magnitude of power of a given input signal. Differential Amplifier Circuits _____ 11.0 Introduction Differential amplifier or diff-amp is a multi-transistor amplifier. nice questions, but less questions. A tuned amplifier amplifies a certain range of frequencies (narrow band of frequencies) in the radio frequency region and rejects all other frequencies. The voltage gain of an emitter follower is just a little less than one since the emitter voltage is constrained … Diode cut in voltage value for si and Ge diodes? Electric Circuits Questions and Answers – The Inverting and Non-Inverting Amplifier Circuit « Prev. inverting amplifier. 1. Question -2: What is FTTH? Operational Amplifiers Questions and Answers Q1. D) 1 only. What is output offset voltage? Negative peak clipper means 8. It is used to provide high voltage gain and high common mode rejection ratio. Cascade amplifier is a Common base amplifier stage in cascade with common emitter stage. Question -1: Explain two main components which form fiber optic communication system. Positive peak clipper means 7. 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. 5. Ans: The common collector junction transistor amplifier is commonly called an emitter follower. The device that amplifies the amplitude of the input signal is called the amplifier. Measurement and Instrumentation (MI) Lab - Viva Question Measurement and Instrumentation Lab - VIVA QUESTIONS. 05: What is op-amp? That is, it has two inputs of opposite polarity. Hence the complete signal present at the input is amplified at the output. 2. Answer: [C] 2,3. LED converts electrical signal to light form and photo diode does the reverse. some viva question and answer about amplifier 1. These questions are very useful as college viva questions also. What is the range of resistance can be measured using Wheatstone bridge; What do u … Name two advantages of a Wheatstone bridge over an ordinary ohmmeter. Other names of clippers are-----. What is an operational amplifier? 01: What is meant by SOA? 1. The opamp in the Inverting circuit is in _____ a) Linear region b) Saturation c) Cut-off region d) Non-linear region View Answer. VIVA VOICE QUESTIONS: 1. LINEAR IC APPLICATIONS LAB DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING 5 EXPERIMENT.2 … 2) What is the condition for the proper transistor action? What are the various types of tuned amplifiers? 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? Why differential amplifier is used as an input stage of IC op-amp? This chapter discusses about the Logarithmic amplifier and Anti-Logarithmic amplifier in detail. 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