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