However, there is no output signal. Active devices such as transistors, FET’s have linear input output characteristic for small signal variations around the Q-point. Search Here for Skill. Class B amplifier: Class B amplifiers are biased at zero DC bias collector current.Hence it conducts only for half of the input signal cycle, so the conduction angle for class B amplifier is 180 Degrees. Additional characteristics include very low DC offset, low drift, low noise, very high open-loop gain, very high common-mode rejection ratio, … Because of the symmetric construction of two sides of the amplifier the even harmonics are cancelled and output signal distortion can be minimized. The phase distortion is of prime concern in video amplifiers; hence extra elements are added to nullify distortion. 29. (C) nearly twice cut-off. Define Transconductance, Transresistance, voltage gain, current gain? The class _____ amplifier is biased below cutoff. 26. An Instrumentation Amplifier (In-Amp) is used for low-frequency signals (≪1 MHz) to provi… 10. d)Voltage shunt: Output signal is voltage signal, feedback signal is current signal. MCQ in Electronic Circuits, Analysis, Design Part 5 as part of the Electronics Engineering Board Exam. Common Source amplifier is on in which the Source terminal is common to both input and output circuit. It is employed in current amplifiers. Figure 2.85 shows the schematic representation of a precision instrumentation amplifier. C) they can be connected in parallel for added drive capability. The tuned amplifier shown in the figure will deliver maximum power only in the bandwidth of LC resonant circuit. Modulator Push pull amplifiers are more efficient than the single ended power amplifiers. It is often encountered in large signal amplifiers. A. Op-amps and Applications - Electronic Engineering (MCQ) questions & answers. The audio frequencies are in the range 20 Hz to 20,000 Hz. D) much less than 180° of the input cycle. Your email address will not be published. 1. Also called as shunt-series feedback. Instrument Calibration Multiple Choice Questions, Instrument Calibration Interview Questions, Instrument Calibration Measurement Quiz, Calibration MCQ. The following equations are provided for MOSFET’s with voltage divider bias arrangement having Rg1 and Rg2 as biasing resistors at the gate terminal and constant current source at the source terminal. Transconductance of an amplifier is defined as ratio of output current to input voltage fed to amplifier. A class A amplifier has a voltage gain of 30 and a current gain of 25. Which class of amplifier operates in the linear region for only a small part of the input cycle? Refer to Figure 7-3. What is the effect of each feedback network topologies on input and output resistance? Almost any op amp will work for this design. MCQ in Operational Amplifiers from the book Electronic Devices and Circuit Theory 10th Edition by Boylestad. The main disadvantages of the push pull amplifier are the need for two identical transistors and the requirement of bulky and costly coupling transformers used for phase splitting. Typically a low-pass amplifier will be having a bandwidth in the range from 2 to 10 MHz. Trans-resistance of an amplifier is defined as ratio of output voltage to input current fed to amplifier. A pinoybix mcq, quiz and reviewers. Voltage gain with feedback = Voltage gain without feedback* desensitivity factor (since desensitivity factor << 1 in negative feedback, hence Voltage gain without feedback < gain without feedback). What is the power gain? Instrumentation Amplifier provides the most important function of Common-Mode Rejection (CMR). You find that this amplifier only shows the negative alternation at the output. The principal advantage(s) of MOSFETs over BJTs is (are). Common Drain amplifier is on in which the Drain terminal is common to both input and output circuit. A power amplifier stage is an amplifier optimized to deliver high output power. 28. Requirements of a Good Instrumentation Amplifier The maximum efficiency of a class B amplifier is _____ percent. What is a nyquist criterion to differentiate the feedback in amplifiers? This amplifier is operating as a ______ amplifier. Electronic Instruments - MCQs with answers Q1. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. 25. A class A amplifier with RC = 3.3 kΩ and RE = 1.2 kΩ has a VCC = 20 V. Find IC(sat). Select an Op Amp. They are. The conduction angle is slightly greater than 180 Degrees. Hence the conduction angle is 360 Degrees i.e. BACK TO TOP. Pinoybix.org is an engineering education website maintained and designed toward helping engineering students achieved their ultimate goal to become a full-pledged engineers very soon. The approximate voltages on the base, collector, and emitter, respectively, are, 14. ElectricalNotes4u is a Blog for Electrical Engineering Students who want to learn Electrical Engineering online. What are the types of distortions encountered in amplifiers? This amplifier is operating as a ______ amplifier. Refer to Figure 7-2. Non linear distortion with feedback = Non linear distortion without feedback* desensitivity factor (since desensitivity factor << 1 in negative feedback, hence Non linear distortion without feedback > Non linear distortion without feedback). Current gain of an amplifier is defined as ratio of output current to input current fed to amplifier. c) The saturation voltage V CE for silicon transistor is same as that for germanium. Class A amplifier: In class-A amplifiers the collector is biased at a value greater than the amplitude of AC signal current. tion applications are instrumentation amplifiers, and by no means are all in-amps used only in instrumentation applications. ... Extension of Ammeter Range. It cancels out any signals that have the same potential on both the inputs. Therefore the total power is given as Pt= P(1+D^2) where P is the power delivered at fundamental frequency. Because the transistor operation is carried out by two types of charge carriers (maj…, Semiconductors Diodes Questions & Answers, What is a PN junction diode? Also called as shunt-shunt feedback. 24. You find that there is no output signal. Choose the letter of the best answer in each questions. Leave a Reply Cancel reply. 27. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. However, with circuit size in … The output voltage is. In practice, the efficiency of a capacitively coupled class A amplifier is about _____%. Frequency and phase distortion occurs when the signal frequencies lie outside the band width of amplifier. We will Provide You Notes on all Major subject of electrical engineering. It has high CMMR, offers high input impedance and consumes less power. Quiescent power is the power dissipation of a transistor, 3. the Class A stage conducts for the entire cycle for the input signal. They are. MCQ in Rectifier ; MCQ in Filters ; MCQ in Voltage Regulation; Continue Practice Exam Test Questions Part 6 of the Series. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Similarly |A3/A1| is called third harmonic distortion and so on. 12 V. C. 10 V. D. 15 V. 14. The time during which the transistor conducts i.e. Refer to Figure 7-2. Practice Exam Test Questions . Some of the applications are in television receivers, cathode-ray-tube computer terminals, and pulse amplifiers. For BJT power transistors, the collector terminal is always connected to the transistor’s case. c)Current shunt: Output signal is current signal, feedback signal is current signal. C) because the collector terminal is the critical terminal for heat dissipation. 11. Refer to Figure 7-3. There are mainly four types of amplifiers based on conduction angle. You are purchasing an access card only. Complementary Push-pull amplifiers use two “complementary” or matching transistors, one being an NPN-type and the other being a PNP-type with both power transistors receiving the same input signal together that is equal in magnitude, but in opposite phase to each other. These amplifiers have varying bandwidths based on the type of filter used at each point. A class B amplifier operates in the linear region for. 12. What is complementary push-pull amplifier? In-amps are used in many applications, from motor control to data acquisition to automotive. Refer to Figure 7-1. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Required fields are marked * Comment. Input resistance with feedback = Input resistance without feedback/ desensitivity factor (since desensitivity factor << 1 in negative feedback, hence Input resistance without feedback > Input resistance without feedback). operational amplifier objective type Questions and Answers pdf free download :-Posted on by Leave a comment. There are four types of amplifiers based on input signal fed to it and the output signal extracted from it. Home » Electronics » Questions and Answers » Floyd Questions and Answers ». Accept Read More, Bipolar Junction Transistors Questions & Answers…, 1. Special attention has to be paid in designing such amplifiers as the power dissipation across the junction raises its temperature and eventually destroys it. Tuned amplifier is one in which a tuned circuit is introduced in to the output circuit which draws maximum power output only for a specified range of frequencies. A) slightly more than 180° of the input cycle. It is specified in units of ohms and is denoted by Rt. Class _____ amplifiers are normally operated in a push-pull configuration in order to produce an output that is a replica of the input. MCQ on Measuring Instruments – 3. a)Voltage-series: Output signal is voltage signal, feedback signal is voltage signal. Also called as shunt-shunt feedback. 23. class notes on electrical measurements & instrumentation 2015 1 class notes on electrical measurements & instrumentation for 5th & 6th semester of electrical engineering & eee (b.tech programme) department of electrical engineering veer surendra sai university of technology burla -768018, odisha, india What is the effect of negative feedback on voltage gain, BW, Noise, nonlinear distortion, Ri, Ro of a voltage amplifier? Hence it conducts only for half of the input signal cycle, so the conduction angle for class B amplifier is 180 Degrees. The maximum efficiency of this amplifier is, 17. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Linear Applications of Op-amp 1) Due to presence of a capacitor in feedback path, the output of an integrator varies ______ a. Tuned amplifiers are used in video and radio frequency applications. The amplifier is conducting only 28°. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Linear Integrated Circuit Questions and Answers – Voltage Series Feedback Amplifier – 2 advertisement Manish Bhojasia , a technology veteran with 20+ years @ Cisco & … (B) just at cut-off. Refer to Figure 7-2. 22. Explain why an ordinary junction transistor is called bipolar? A pinoybix mcq, quiz and reviewers. We'll assume you're ok with this, but you can opt-out if you wish. What do you call an amplifier which has an output current flowing during the whole input current cycle? What are the different types of feedback topologies? A class _____ amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180º of the input cycle. It is specified in units of mhos (or) Siemens and is denoted by Rt. 13. The possible trouble might be that, 19. Instrumentation Amplifier Definition: A special type of amplifier that is used to amplify signals of extremely low-level is known as Instrumentation Amplifier. Input impedance and consumes less power amplifier only shows the schematic representation of a instrumentation! Curve of input output characteristics in amplifiers Ro, voltage gain of 25 c. averaging amplifier ; D. summer nonzero-level! Letter of the best answer in each Questions instrumentation applications both the inputs power is the effect each. 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