The Q-point is at cutoff for class _____ operation. There are mainly three types of distortions encountered in amplifiers. 11. Multiple Choice Questions and Answers on Op-Amp ( Operational Amplifier ) In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: The least efficient amplifier among all classes is. The audio frequencies are in the range 20 Hz to 20,000 Hz. Refer to Figure 7-2. A class C amplifier has a tank circuit in the output. Give expressions for Ri, Ro, Voltage gain of CS, CD, CG? They are. Modulator Refer to Figure 7-3. Normally Class AB power amplifiers are used to do audio amplification. Similarly |A3/A1| is called third harmonic distortion and so on. You find that this amplifier only shows the negative alternation at the output. Which amplifier is commonly used as a frequency multiplier? This results in one transistor only amplifying one half of the input waveform cycle while the other transistor amplifies the other half of the input waveform cycle with the resulting “two-halves” being put back together again at the output terminal. c) The saturation voltage V CE for silicon transistor is same as that for germanium. The main difficulty with this circuit is the if there is unbalance in the characteristic f the two transistors considerable distortion will be introduced. The signals that have a potential difference between the inputs get amplified. This amplifier is operating as a ______ amplifier. The problem might be that, 18. Push pull amplifiers are more efficient than the single ended power amplifiers. Designing an Instrumentation Amplifier 1. This amplifier is operating as a ______ amplifier. (Last Updated On: December 8, 2019) This is the Multiple Choice Questions in Special-Purpose Op-Amp Circuits from the book Electronic Devices – Electron Flow Version and Conventional Current Version 8th Edition by Thomas L. Floyd. A. The most likely choice would be a ______ amplifier. 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. Name * Email * Website. This website uses cookies to improve your experience. The voltage gain of a basic instrumentation amplifier is set by a(n) An OTA has A(n) ________ amplifier is a differential voltage-gain device that amplifies the difference between the voltages existing at … The output voltage is. Typically a low-pass amplifier will be having a bandwidth in the range from 2 to 10 MHz. Linear Integrated Circuit Questions and Answers – Voltage Series Feedback Amplifier – 2 advertisement Manish Bhojasia , a technology veteran with 20+ years @ Cisco & … New frequencies appear in the output due to non linear distortion. d)Voltage shunt: Output signal is voltage signal, feedback signal is current signal. 24. 23. It is employed in voltage amplifiers. operational amplifier objective type Questions and Answers pdf free download :-Posted on by Leave a comment. Some of the applications are in television receivers, cathode-ray-tube computer terminals, and pulse amplifiers. It is basically a differential amplifier, that performs amplification of difference of input signal. What are the different types of feedback topologies? Consider a power amplifier which is given a input of A*sin (w*t), the output is in the form of A1*sin (w*t) + A2*sin (2*w*t)+A3*sin(3*w*t)+……… The ratio of |A2/A1| is called as second harmonic distortion. Example of a tuned amplifier is shown below. Class B amplifier: Class B amplifiers are biased at zero DC bias collector current. Select an Op Amp. It cancels out any signals that have the same potential on both the inputs. A class A amplifier with RC = 3.3 kΩ and RE = 1.2 kΩ has a VCC = 20 V. Find IC(sat). A class _____ amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180º of the input cycle. we respect your privacy and take protecting it seriously, Multiple Choice Questions in Floyd’s Electronic Devices, Pinoybix Elex is officially on Google Play | First of …, Complete List of Reviewers to Pass Engineering Board Exam, MCQ in Machine Design and Shop Practice Part 18 | …, MCQ in Machine Design and Shop Practice Part 17 | …, MCQ in Machine Design and Shop Practice Part 16 | …, Floyd: MCQ in Special-Purpose Op-Amp Circuits, Floyd: MCQ in Amplifier Frequency Response, Floyd: MCQ in FET Amplifiers and Switching Circuits, Floyd: MCQ in Field-Effect Transistors (FET), Floyd: MCQ in Bipolar Junction Transistor Amplifiers, Floyd: MCQ in Bipolar Junction Transistors, Floyd: MCQ in Introduction to Semiconductors. It is specified in units of ohms and is denoted by Rt. Audio amplifiers are electronic power amplifiers used to amplify low intensity audio signals to a level suitable to drive loud speakers. What is non-linear distortion in power amp? You measure the dc voltage of Q1 emitter and find it equal to 0 V. The trouble might be, 20. The dc voltage on the collector, VC, is. The conduction angle is slightly greater than 180 Degrees. A) slightly more than 180° of the input cycle. The amplifier is conducting only 28°. c)Current shunt: Output signal is current signal, feedback signal is current signal. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam. The possible trouble might be that, 19. This is the Multiple Choice Questions in Power Amplifiers from the book Electronic Devices – Electron Flow Version and Conventional Current Version 8th Edition by Thomas L. Floyd. 27. 25. Refer to Figure 7-3. 12. Hence it conducts only for half of the input signal cycle, so the conduction angle for class B amplifier is 180 Degrees. Tuned amplifiers are used in video and radio frequency applications. Practice Exam Test Questions . 29. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Analog Devices instrumentation amplifiers (in-amps) are precision gain blocks that have a differential input and an output that may be differential or single-ended with respect to a reference terminal. 8. Answered MCQ; Instrumentation amplifier is an extension of # Non inverting amplifier Inverting amplifier Summing amplifier Differential amplifier Comments and Answers (2) # Special attention has to be paid in designing such amplifiers as the power dissipation across the junction raises its temperature and eventually destroys it. 26. What are the types of distortions encountered in amplifiers? Active devices such as transistors, FET’s have linear input output characteristic for small signal variations around the Q-point. Also called as shunt-shunt feedback. MCQ in Class AB Push-Pull Amplifiers ; MCQ in Class C Power Amplifier ; If you are looking for the Self-test in Floyd’s Electronic Devices proceed to ️ Floyd Self-test in Power Amplifiers. 4. Before purchasing, check with your If you are looking for a reviewer in Electronics Engineering this will definitely help. If you are looking for the Self-test in Floyd’s Electronic Devices proceed to. 1. What is the effect of each feedback network topologies on input and output resistance? 30. b) Frequency distortion: This type of distortion occurs when the signal components of different frequencies are amplified differently. You then measure the dc voltages on Q2 and find them to be all 0 V. The possible trouble might be, 21. Frequency and phase distortion occurs when the signal frequencies lie outside the band width of amplifier. Explain why an ordinary junction transistor is called bipolar? Where Rg = Rg1//Rg2, gm is Transconductance, Rd is the resistance at the drain terminal. D) much less than 180° of the input cycle. We also Provide Important MCQ that will help you to Prepare for Competitive Exam. In a class AB amplifier, if the VBE drops are not matched to the diode drops or if the diodes are not in thermal equilibrium with the transistors, this can result in. 13. 6. Current gain of an amplifier is defined as ratio of output current to input current fed to amplifier. b)Current series: Output signal is current signal, feedback signal is voltage signal. Source amplifier is 180 Degrees CF of silicon transistor the Gate terminal is to... A small part of the best answer in each Questions a replica of the best answer in Questions. Students achieved their ultimate goal to become a full-pledged engineers very soon voltage may... A bandwidth in the range from 2 to 10 MHz will help you to Prepare for Exam... 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