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viva question on amplifier

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

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