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. Question 21. 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. An integrator is a circuit that performs a mathematical operation called integration. Operational Amplifier's Previous Year Questions with solutions of Analog Electronics from GATE EE subject wise and chapter wise with solutions. 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. This website uses cookies to improve your experience. Input offset voltage may be defined as that voltage which is to be applied between the input terminals to balance the amplifier. Question 20. Op-amp Is Used Mostly As An Integrator Than A Differentiation. What are the applications of op-amps? Go through our Amplifier job interview questions and answers page to prepare well for the best job in reputed organizations. Question 27. If feedback from output to input is given in such in a way that the introduction of feedback in the amplifier decreases the overall gain, then the feedback is termed as negative feedback. Explain what is a rectifier? Question 11. Explain What Is A Differential Amplifier? This resistance has to be high in order that the CMMR of differential amplifier to be high. This makes the circuit analysis and design simplified and each stage can be considered as isolated as far as DC signals are considered. It is also known as the quiescent or Q-point. Then wisdom jobs is the best place to get started. 2. What are avoidable questions in an Interview? If feedback resistor is made zero or R1 is made ∞(by keeping it open-circuited) in a noninverting amplifier circuit, voltage follower is obtained. Answer: An instrumentation amplifier is a differential op-amp circuit providing high input impedances with ease of gain adjustment by varying a single resistor. These capacitance’s introduce negative feedback from output to input which reduces the amplifier gain at high frequencies. Question 16. Question 32. 3. infinite input impedance. All of the following are basic op-amp input modes of operation EXCEPT A. inverting mode B. common-mode Cascade amplifier is a Common base amplifier stage in cascade with common emitter stage. What Is The Formula For Non Inverting Amplifier? A differential amplifier provides high gain for differential input signals and low gain for common mode signals. 5 Top Career Tips to Get Ready for a Virtual Job Fair, Smart tips to succeed in virtual job fairs. OPAMP is called direct coupled because the input of one OPAMP is inserted into the input of another OPAMP. When an op-amp is operated in the open-loop configuration, the output either goes to positive saturation or negative saturation levels or switches between positive and negative saturation levels and thus clips the output above these levels. If we give the sinusoidal input in differentiator we will get the output of differentiator as a square output. In an inverting amplifier, the input is connected to the minus or inverting terminal of op-amp. Question 35. kindly tell ,how to save the document. A certain noninverting amplifier has R i of 1 kΩ and R f of 100 kΩ. a) The CE amplifiers are used in applications where high gain is required. 71. where Ad (differential gain) = -gm*Rc, Acm (common mode gain of each stage)= -Rc/(2*Re) and the overall common mode gain of differential amplifier will be double of Acm. What are interacting and non-interacting cascading stages? It is used as high frequency amplifier combined with common emitter amplifier. Which Opamp Don’t Have Feedback Loop? How will you test IC741 for proper working? 4. It is a device which converts a non electrical quantity into an … 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). Question 15. This role is highly respected, can receive considerable recognition and highly visible position with significant career advancement Amplifier jobs. 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. 2. Following are the some of the characteristic parameters of CB amplifier neglecting the output resistance of amplifier (which accounts for early effect) are, Common emitter amplifier is on in which the emitter terminal is common to both input and output circuit. An instrumentation amplifier is a type of differential amplifier that has been outfitted with input buffer amplifiers, which eliminate the need for input impedance matching and thus make the amplifier particularly suitable for use in measurement and test equipment. Define transducer? What are the important CPU registers in the 8085 microprocessor? Looking to crack the Amplifier Job interview? In addition, several dif-ferent categories of instrumentation amplifiers are addressed in this guide. 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