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