A capacitive coupling is one in which the output of one stage of amplifier is connected to the input of second stage through a capacitor. The degree of reproducibility among several independent measurements of the same true value under reference conditions. Question 23. Often amplifier with common emitter multi stages is referred to as Cascade amplifier. Go through our Amplifier job interview questions and answers page to prepare well for the best job in reputed organizations. An integrator is a circuit that performs a mathematical operation called integration. b) CC amplifiers are used as voltage buffers for connecting high resistance source to low resistance load. For n Non-interacting stages with each stage having lower and upper cut-off frequencies as fl, fh the upper and lower cut-off frequencies are given as follows. If the feedback resistor in Q15 (above question) is open, the voltage gain ……. Top 10 facts why you need a cover letter? In negative feedback amplifiers it is the negative product of loop gain and feedback factor. Viva Questions and Answers on Bipolar Junction Transistor Experiment 1. Voltage follower has three unique characteristics viz. At high frequencies internal feedback capacitance’s comes into picture. Such amplifiers are called cascade amplifiers. Electronics and Communications Engineering Interview Questions, Electrical Engineering Interview Questions, Electronic Devices and Circuits Interview Questions, Electrical Power System Interview Questions, Electronics and Communications Engineering Practice Tests, Business administration Interview questions, Cheque Truncation System Interview Questions, Principles Of Service Marketing Management, Business Management For Financial Advisers, Challenge of Resume Preparation for Freshers, Have a Short and Attention Grabbing Resume. A …, Bipolar Junction Transistors Questions & Answers…, 1. Question 27. In addition, several dif-ferent categories of instrumentation amplifiers are addressed in this guide. Define CMRR. Instrumentation amplifiers … A certain noninverting amplifier has R i of 1 kΩ and R f of 100 kΩ. The process of determining the amount, degree, or capacity by comparison (direct or indirect) with the accepted standards of the system units being used. 2. Question 14. The term Coupling occurs in multi stage amplifiers and refers to the way in which the output of one stage is connected to the input of next stage. Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry.He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. All of the following are basic op-amp input modes of operation EXCEPT A. inverting mode B. common-mode What Is The Output Differentiation And Integrator? Question 2. 2. menu ExamSIDE Questions. A direct coupling is one in which the output of one stage of amplifier is connected to the input of second stage in such a way to allow even DC signals from one stage to another. Explain What Do You Mean By Operating Point? Explain What Are Differential Gain And Common-mode Gain Of A Differential Amplifier? Top 4 tips to help you get hired as a receptionist, 5 Tips to Overcome Fumble During an Interview. 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. What is lower/upper cut-off frequency of non-interacting cascading stages? Explain What Is A Differential Amplifier? Removal of bypass capacitor in a CE amplifier circuit causes excessive degeneration in the amplifier circuit and therefore reduction in voltage gain. What is the difference between inverting and non inverting amplifier? Explain What Are The Applications Of Integrator? Mention the need and advantage of Instrumentational amplifier? Instrumentation Lab Viva Questions S Bharadwaj Reddy December 16, 2015 March 24, 2019 Are you preparing for instrumentation lab exams or instrumentation workshops ? OPAMP is called direct coupled because the input of one OPAMP is inserted into the input of another OPAMP. It is also known as the quiescent or Q-point. use it to save in pdf. Save my name, email, and website in this browser for the next time I comment. 3. From the given circuit, Derive the CMRR of the instrumentation Amplifier, showing the… If in a cascade of stages the input impedance of one stage is high enough so that it will not be able to affect the output impedance of the preceding stage the stages are said to Non-interacting stages. Looking to crack the Amplifier Job interview? 2. 70. The main disadvantage with DC coupling is, since there is no DC isolation the first stage acts as a biasing circuitry for the second stage, the AC signal current is superimposed on DC quiescent currents and this effect propagates. The upper cut-off frequency of n interacting stages with each stage having upper cut-off frequencies fh is, 1/fh” = 1.1*((1/f1^2)+(1/f2^2)+……..+(1/fn^2))^(1/2). What is an op-amp? Ans Characteristic of ideal OPAMP are. Alternatively in the improvised versions of differential amplifiers a constant current source is kept in emitter lead to provide very high resistance (Theoretically infinite). 4. 6 things to remember for Eid celebrations, 3 Golden rules to optimize your job search, Online hiring saw 14% rise in November: Report, Hiring Activities Saw Growth in March: Report, Attrition rate dips in corporate India: Survey, 2016 Most Productive year for Staffing: Study, The impact of Demonetization across sectors, Most important skills required to get hired, How startups are innovating with interview formats. Answer : An operational amplifier, abbreviated as op-amp, … Measurement and Instrumentation Lab - VIVA QUESTIONS. Question 34. Explain What Is An Integrator? Question No. 75. It is shown in the figure below. What are interacting and non-interacting cascading stages? What are the applications of transistor amplifiers? The same differential amplifiers implemented using MOSFET’s is shown below. It is used as high frequency amplifier combined with common emitter amplifier. Q15. Making a great Resume: Get the basics right, Have you ever lie on your resume? Give Examples Of Linear Circuits? The frequency response of the direct coupled amplifier is similar to low pass filter and is characterized by rise time. It has infinite voltage gain, infinite slew rate, infinite input impedance, zero output impedance, infinite bandwidth. This is the most frequently used coupling. State Assumptions Made For Analyzing Ideal Op-amp? It can be used as single stage or in cascade. Introduction of Transformer makes the amplifier bulkier and costly. The zero signal values of IC and VCE are known as the operating point. Because the transistor operation is carried out by two types of charge carriers (maj…, Bipolar Junction Transistors Questions & Answers, Operational Amplifiers Questions & Answers, Electrical & Instrumentation QC Interview Questions, What is Electrical Conduit? Q16. ... Bridges in Electronic Instrumentation can be classified as DC bridges and AC bridges. Slew rate of an op-amp is defined as the maximum rate of change of output voltage per unit time and is expresses in V/µs. In this condition it is known as perfect balance. These capacitance’s introduce negative feedback from output to input which reduces the amplifier gain at high frequencies. So open-loop op-amp configurations are not used in linear applications. (a) remains unaffected (b) decreases by the same amount as the gain increase (c) increases by the sane saaaajajt as the gain decrease Name two advantages of a Wheatstone bridge over an ordinary ohmmeter. Question 21. Question 17. Explain What Is An Inverting Amplifier? What is the effect of degeneration resistance on CMMR? If in a cascade of stages the input impedance of one stage is low enough to act as an appreciable shunt on the output impedance of the preceding stage the output impedance of the preceding stage the stages are said to interacting stages. 3. Define Offset Voltage As Applied To An Op-amp? Some of the Advantages of negative feedback: The main disadvantage of negative feedback is decrease in overall gain. Explain What Is Meant By Small Signal Amplifier? Then wisdom jobs is the best place to get started. Explain Why Open-loop Op-amp Configurations Are Not Used In Linear Applications? It is obvious from the expression of CMMR that increase in emitter degeneration resistance increases CMMR. Question 12. Question 1. Explain Why Common-collector Circuit Is Known As An Emitter Follower? For The Cmrr To Be Infinite What Will Be The Condition? Question 35. The parameters to be considered for dc applications are: The parameters to be considered for ac applications are: Question 8. Question 33. Engineering Electronics ECE Electrical EEE FAQs Measurements and Instruments Unit wise Two Marks, Short, Viva, Interviews Questions and Answers PDF Download If we give the sinusoidal input in differentiator we will get the output of differentiator as a square output. Amplifier is a device that makes sound louder and signal level greater. instrumentation amplifiers commonly known as INAMPS are differantial amplifiers having high input impedane, low output impedance. What Is Instrumentation Instrumentation Engineering? What Is Perfect Balance In Op Amp? What is servo mechanisms? Its low input resistance finds application in specific areas where the signal strengths are very low (or) when load on source should be very low. The dynamic resistance of the emitter-base junction diode is called the ac emitter resistance. Mention monolithic instumentaional amplifier? This role is highly respected, can receive considerable recognition and highly visible position with significant career advancement Amplifier jobs. Solution for Attached, a figure of the famous instrumentation amplifier. 5 Top Career Tips to Get Ready for a Virtual Job Fair, Smart tips to succeed in virtual job fairs. Additional characteristics include very low DC offset, low drift, low noise, very high open-loop gain, very high common-mode rejection ratio, and very high input impedances. Explain What Is Transistor Biasing? It is called operating point because the variations of IC and VCE take place about this point when signal is applied. Common base amplifier is on in which the base terminal is common to both input and output circuit. Question 6. 4. Question 36. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, … Question No. Question 38. Comparator OP AMP (operational amplifier) don’t have feedback loop. What are the types of V/I converter? The MOSFET differential amplifier provides high input resistance but less gain compared to differential amplifiers implemented using BJT’s. Explain What Is An Ac Emitter Resistance? Want to know about commonly asked Amplifier Job questions along with answers? The process of raising the strength of a weak signal without any change in its general shape is referred to as faithful amplification. The addition of input buffer stages makes it easy to match (impedance matching) the amplifier with the preceding stage. AC Millivoltmeter (2) Audio Systems (11) Basic Electronics (14) Bioelectric Amplifiers (5) Bioinformatics (12) Biomedical Instrumentation (71) Biotelemetry system (5) Bridges (12) ... 8085 Microprocessor Lab Viva Questions With Answers 1. Amplifiers are of two types: power amplifiers or weak-signal amplifiers. Perfect balance is the characteristics of ideal OP AMP and if there is same input applied then we will get the output zero. Measurements and Instrumentations LAB VIVA Questions :-1. Explain What Is A Voltage Follower? It is a device which converts a non electrical quantity into an … Question 11. In wireless receivers, weak-signal amplifiers are mainly used. A differential amplifier provides high gain for differential input signals and low gain for common mode signals. Op-amp is used mostly as an integrator than a differentiator because in differentiator at high frequency, gain is high and so high-frequency noise is also amplified which absolutely abstract the differentiated signal. Question 13. Explain What Are The Applications Of An Inverting Amplifier? Explain What Is Meant By Phase Reversal? Question 30. List The Parameters That Should Be Considered For Ac And Dc Applications? Dear sir, increases; decreases; is not affected; depends on R i; Answer : 1 Adder or summing amplifier is a circuit that provides an output voltage proportional to or equal to the algebraic sum of two or more input voltages multiplied by a constant gain factor. 16. 73. When the difference of the two inputs applied to the two terminals of a differential amplifier is amplified, the resultant gain is termed as differential gain. The difference is in the source of excitation. 2. what is accuracy of a measurement? This website uses cookies to improve your experience. If a amplifier has feedback path exists from output to input then that amplifier is termed as Feedback amplifier. It is also called as return difference. Inverting amplifier is a very versatile component and can be used for performing number of mathematical stimulation such as analog inverter, paraphrase amplifier, phase shifter, adder, integrator, and differentiator. 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Differentiation, addition, several dif-ferent categories of instrumentation amplifiers commonly known as perfect balance ac bridges strength of Wheatstone... Assumptions made for analyzing ideal op-amp at the bottom of the four characteristics given,! 8085 microprocessor need instrumentation amplifier viva questions cover letter requirements for an instrumentation amplifier it will be infinite What be.

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