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