The proper flow of zero signal collector current and the maintenance of proper collector emitter voltage during the passage of signal is called the transistor biasing. All Rights Reserved. Analog Electronic Circuits Laboratory Viva Questions 6. Question 16. Write the Gain formula for an inverting and non-inverting op-amp. Then from superposition theorem, the output voltage V out is equal to V out = A V1 Vin1 + A V2 Vin2. Ltd. Wisdomjobs.com is one of the best job search sites in India. Question 19. The process of raising the strength of a weak signal without any change in its general shape is referred to as faithful amplification. 2. Digital signal processing lab viva questions on Z transforms and DFT, FFT Home / lab viva questions / DSP Part-II& III Part-II : Z Transforms 1. In an inverting amplifier, the input is connected to the minus or inverting terminal of op-amp. Making a great Resume: Get the basics right, Have you ever lie on your resume? What is an amplifier? Define one-sided and two-sided Z-transform. The output voltage changes in the same direction as the input voltage. Your email address will not be published. The parameters to be considered for dc applications are: The parameters to be considered for ac applications are: Question 8. Why Opamp Called Operational Amplifier? Analog Devices' Selection Table for Difference Amplifiers lets you add, remove, and configure parameters to display; compare parts and choose the best part for your design. amplifier. What are differential gain and common-mode gain of a differential amplifier? Question 14. EC8351 EC-I Notes. What is an operational amplifier? Q24. It is also known as the quiescent or Q-point. Updated March 26, 2020. Voltage follower has three unique characteristics viz. extremely high input impedance, extremely low output impedance and unity transmission gain and is , therefore, an ideal circuit device for use as a buffer amplifier. Top 10 facts why you need a cover letter? IC LM324, LM224, LM2902 are a series of IC’s with quad operational amplifiers. Vpp (10 Volts) 100 K 2 Rc1 Rc2 100 Ks2 For Q4 And Qs: VA = 0, Q4 And Qs Are Matched. 2/4/15. How Can Freshers Keep Their Job Search Going? Amplifier is a device that makes sound louder and signal level greater. • Zero output impedance. Previous GATE Questions on Operational Amplifiers & Differential Amplifiers - II (2001 - Till Date) 2001. Explain What Is An Operational Amplifier? 1. 15 signs your job interview is going horribly, Time to Expand NBFCs: Rise in Demand for Talent, Nil drift of characteristics with temperature, Characteristics not drifting with temperature. Where. Explain What Are Differential Gain And Common-mode Gain Of A Differential Amplifier? Hence using this as front end component out of band noise can be eliminated which is common to both input terminals. Write the formulae for sum of three inputs for an op-amp. In the differential amplifier shown in the figure, the magnitude of the common mode and differential mode gains are A cm and A d, respectively. Why differential amplifier is used as an input stage of IC op-amp? Why Opamp Called Direct Coupled High Differential Circuit? 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. An operational amplifier is a direct coupled high-gain electronic amplifier with a differential input to which feedback is given to control its response characteristics at its single-ended output. Inverting Operational Amplifier Gain, A = – Rf / R, Non Inverting Operational Amplifier Gain, A = 1 + Rf/ R. List a few applications of the operational amplifier. IC 741 – It is the most commonly used op-amp IC comes with 8-pin dual-in-line package. Differential amplifier BJT. Differential amplifier BJT. 2. Q23. Explain What Are The Advantages Of Using A Voltage Follower Amplifier? Explain Why Open-loop Op-amp Configurations Are Not Used In Linear Applications? It has infinite voltage gain, infinite slew rate, infinite input impedance, zero output impedance, infinite bandwidth. Question 23. The term LVDT stands for the Linear Variable Differential Transformer.It is the most widely used inductive transducer that converts the linear motion into the electrical signal.. The output of the circuit is ideally proportional to the difference between the two signals. Explain What Are The Applications Of An Inverting Amplifier? Explained, Common types of Switches used in electrical wiring, 150+ Electrical & Electronics Abbreviations & Full forms : A-Z quick notes, Transformer Protection Relays Types and Use, Different Types of High Voltage Circuit Breakers Used in Substations, Single phase induction Meter Advantages & Disadvantages, Electric Motor Interview Viva Questions and Answers, Infrared burglar alarm using IC 555 circuit diagram, Rectifier – Half wave rectifier and Full wave rectifier, Resistor calculations | series and parallel circuits. A differential amplifier provides high gain for differential input signals and low gain for common mode signals. Question 26. Common Mode Rejection Ratio (CMRR) of a differential amplifier is the ratio of the common-mode gain to differential-mode gain. In a CE configuration, the output voltage increases in the negative direction when the input signal voltage increases in the positive direction and vice-versa. 1. VOD Q86 3 Q2 Vin + To Vin Ibias - Vout QA Figure 1. Viva Questions 1. It is the capability of the circuit to suppress any power supply variations to its output signal. Question 35. 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. The opamp in the Inverting circuit … Question 34. For The Cmrr To Be Infinite What Will Be The Condition? It is called operating point because the variations of IC and VCE take place about this point when signal is applied. Definition of LVDT. 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. Removal of bypass capacitor in a CE amplifier circuit causes excessive degeneration in the amplifier circuit and therefore reduction in voltage gain. If we give the sinusoidal input in differentiator we will get the output of differentiator as a square output. Go through our Amplifier job interview questions and answers page to prepare well for the best job in reputed organizations. What Is Characteristic Of Ideal Op Amp? 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. Question 18. If Acm will be zero then only it will be infinite. amplified) by the differential amplifier gain A d. Perfect balance is the characteristics of ideal OP AMP and if there is same input applied then we will get the output zero. V 0 is the output voltage; V 1 and V 2 are the input voltages; A d is the gain of the amplifier (i.e. Question 28. Question 25. The differential amplifier implemented using BJT’s are shown below. The device that amplifies the amplitude of the input signal is called the amplifier. Required fields are marked *, How to make Ultrasonic Water Level Indicator Arduino, Arduino Ultrasonic servo rover distance meter, Measure temperature using Arduino and NTC thermistor, LCD Arduino Tutorial – How to connect LCD with Arduino, Arduino Push Button Counter Code LCD Circuit and working, Arduino countdown LCD display code hour:minute:second format, Why Transformer Rating is in kVA not in kW? What are the properties of an Ideal op-amp? power amplifier can increase the output power. State the ideal characteristics of Op-amp. What Is The Formula For Non Inverting Amplifier? Basic Amplifiers and Differential Amplifier CSE 577 Spring 2011 Insoo Kim, Kyusun Choi Mixed Signal CHIP Design Lab. Question 20. Question 7. It is called high gain differential circuit because the difference of the two input is amplified. Question 2. Operational Amplifiers Questions and Answers Q1. List The Parameters That Should Be Considered For Ac And Dc Applications? What is called output offset voltage of an Op-amp? What are avoidable questions in an Interview? Question 6. Op-amp Is Used Mostly As An Integrator Than A Differentiation. Infinite common-mode rejection ratio (CMRR), Infinite power supply rejection ratio (PSRR). What are the various DC characteristics of op-amp? In this condition it is known as perfect balance. A differential amplifier is an amplifier circuit that amplifies the difference between two input signals but suppresses any voltage common to the two inputs. If you are looking for a reviewer in Electronics Engineering this will definitely help. This is the Multiple Choice Questions in Operational Amplifiers from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad. CMRR is defined as the ratio of differential voltage gain to common-mode voltage gain and it is given as CMRR = Ad/Acm. Question 5. All rights reserved © 2020 Wisdom IT Services India Pvt. So open-loop op-amp configurations are not used in linear applications. If the emitter bias currentincreased in a differential amplifier then. Answer : An operational amplifier, abbreviated as op-amp, … This circuit finds wide applications as a buffer amplifier between a high impedance source and a low load. This role is highly respected, can receive considerable recognition and highly visible position with significant career advancement Amplifier jobs. Explain What Is An Operational Amplifier? OPAMP is called direct coupled because the input of one OPAMP is inserted into the input of another OPAMP. Input offset current. After reading this post you will learn about the differential amplifier, working of the differential amplifier, implementation of the differential amplifier using the Operational Amplifier, designing the Differential amplifier to meet the requirements and finally the advantages of the Operational Amplifier. In today’s analog design, simulation of circuits is essential Theory_Questions: 1. What is the main difference between general amplifier and power amplifier? Anna University Regulation 2017 ECE EC8351 EC-I Notes, ELECTRONIC CIRCUITS- I Lecture Handwritten Notes for all 5 units are provided below. Adder, subtractor, differentiator, integrator fall under the category of linear circuits. Operational Amplifier as Differential Amplifier . It is very accurate inductive transducer as compared to other inductive transducers. When the input signal is quite weak and produces less small fluctuations in the output current in comparison to its quiescent value, the amplifier is called the small signal or voltage amplifier. Q-12 What do you mean by gain band width product of an op-amp? Q-13 What do you mean by … Question 13. ENGINEERING FUNDA YOUTUBE CHANNEL SSASIT, SURAT ANALOG ELECTRONICS VIVA & INTERVIEW QUESTIONS PROF. HITESH DHOLAKIYA Ans Slew rate is the maximum rate of change of output voltage per unit of time. Want to know about commonly asked Amplifier Job questions along with answers? Finds wide applications as a ramp output zero gain for the best job search sites in India Follower?... Dependence of these quantities on 2 be eliminated which is grounded search sites in India formulae for sum three... What do you mean by gain band width product of an op-amp the... 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