These are the particular properties that make the amplifier perform in a certain way, and so make it suitable for a given task. For an ideal voltage amplifier circuit, what should be the value of input resistance? MCQ in Electronic Circuits, Analysis, Design Part 1 as part of the Electronics Engineering Board Exam. a) Positive feedback c) Unity c) 0.09V b) level of non- linear distortion decreases View Answer, 5. View Answer, 9. d) Voltage controlled Current source View Answer, 8. Answer: a. It is the choice of input and feedback resistor that determines the overall gain of the stage, by taming the essentially-infinite voltage gain of the op amp. View Answer. b) Amplifier c) Does not improve the signal-to-noise ratio at I/O Positive feedback for active termination. Transistor Biasing & Thermal Stabilization, Small-Signal Low-Frequency AC models of Transistors, Low Frequency Transistor Amplifier Circuit, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Electronic Devices and Circuits Questions and Answers – Multistage Amplifier, Next - Electronic Devices and Circuits Questions and Answers – Voltage Amplifiers, C++ Programming Examples on Hard Graph Problems & Algorithms, C Algorithms, Problems & Programming Examples, C Programming Examples on Hard Graph Problems & Algorithms, Java Programming Examples on Hard Graph Problems & Algorithms, Analog Communications Questions and Answers, Instrumentation Transducers Questions and Answers, Basic Electrical Engineering Questions and Answers, Microwave Engineering Questions and Answers, Linear Integrated Circuits Questions and Answers, Electronic Devices and Circuits Questions and Answers. b) Negative feedback The outputs from these amplifiers are used for further analysis and they appear as ECG, EMG, or any bioelectric waveforms. Feedback can be arranged to increase or decrease the input signal. Sanfoundry Global Education & Learning Series – Electronic Devices and Circuits. Discuss in detail the characteristics of negative feedback amplifier? \$\endgroup\$ – John R. Strohm Apr 9 '18 at 16:32 It usually has a noise which is an amplifier as an oscillating output. Negative feedback in amplifier _____________ Is … View Answer. document discusses feedback from a unilateral point of view. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Feedback is the effect that sound waves make when the output is being recorded by the input. c) Doesn’t need at lower frequencies a) Voltage divider circuit The output of oscillator will not depend upon ___________ d) Reduce Distortion b) Less negative feedback Participate in the Sanfoundry Certification contest to get free Certificate of Merit. The feedback factor is the ratio of the feedback signal and the input signal. 2. 0.3% . here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Analog Circuits Questions and Answers – Heat Sink for Power Transistor-2, Next - Analog Circuits Questions and Answers – Classification of Oscillator-1, Java Programming Examples on Hard Graph Problems & Algorithms, Microwave Engineering Questions and Answers, Wireless & Mobile Communications Questions & Answers, Basic Electrical Engineering Questions and Answers, Instrumentation Transducers Questions and Answers, Analog Communications Questions and Answers, Electronic Devices and Circuits Questions and Answers, Linear Integrated Circuits Questions and Answers, Microwave Engineering Questions and Answers – Microwave Oscillators, Analog Circuits Questions and Answers – Feedback Connection Types, Analog Circuits Questions and Answers – Distortion in Amplifier-1. Is increased. This video is aimed at building concepts of feedback amplifier. a) Constant frequency at low amplitude only Power Amplifier Board, Dual AC20-60V 300W+300W High Power A4 Fully Symmetric Double Differential Power Amp Module for Ktv Speaker Floor Speaker Stage Speaker by Jarchii £56.83 + £8.00 delivery Primary trigger for oscillation is obtained from ___________ Multiple Choice Questions and Answers on Amplifiers with Negative Feedback In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Question Bank in Electronics & Communication Engineering by Prem R Chadha Explanation: Voltage series feedback amplifier have the difference voltage, V id = V in -V f. Therefore, the feedback voltage always opposes the input voltage and is out of phase by 180 o with respect to input voltage. An amplifier with a gain of –500 and a feedback of β = –0.1 has a gain change of 15% due to temperature. To practice all areas of Analog Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. View Answer, 8. View Answer, 9. is a part of an Op-amp has one input and one output has two outputs answers (1) 300+ TOP OP-AMP Questions and Answers pdf | MCQs OP AMP Questions and Answers pdf free download mcqs interview objective type questions for eee ece electronics engineer students operational amplifier With the help of a precision rectifier the high-precision signal processing can be done very easily. As compared to the unity gain amplifier, the amplifier with gain=20 has ___________ Buy Online Login / Register. c) Positive feedback This contains everything in the amplifier except the feedback network. 2.2. b) Constant frequency at high amplitude only c) Amplify In today’s tutorial, we will have a look at How Circuit Capacitances Affect Frequency Response of Amplifier.In amplifier circuits coupling and bypass, capacitors look short to ac at midband frequencies (MidBand frequency or sub-6 is spectrum used for wireless data transmission. The op amp produces an output voltage. b) 40db d) 0.12V c) Capacitive c) Less Bandwidth Driving transmission lines differentially is a typical use for fully differential amplifiers. c) Increases gain – bandwidth product Feedback is the process of taking a proportion of an amplifier´s output signal and feeding it back into the input. View Answer, 7. 0.2% . a) Doesn’t need Negative resistance are incorporated in oscillator for _____ ... Sanfoundry Global Education & Learning Series – Analog Circuits. Also, we examine audio and video feedback. They do not require any type of specific input to function properly. Sanfoundry Global Education & Learning Series – Analog Circuits. d) Current divider circuit This video is aimed at building concepts of feedback amplifier. c) level of non- linear distortion remains stable Oscillators are used to ______ AC voltage. View Answer, 5. The precision rectifier, also known as a super diode, is a configuration obtained with an operational amplifier in order to have a circuit behave like an ideal diode and rectifier. When negative voltage feedback is applied to an amplifier, its voltage gain ………………. Regarding the negative feedback amplifier, which of the following statements is wrong? It creates an infinite sound loop, and produces a loud, high pitched noise. a) 0.03V a) Ro << RL b) Improves the signal-to-noise ratio at output We look at electronic, mechanical, light and money amplifiers. d) Less input impedance a) level of non- linear distortion increases H(jω) is the feedback network which usually consists of two resistors Typically, this effect appears when amplifiers like the OP-07 are used to drive AD574s. All Rights Reserved. A system has a gain of 80 db without feedback, if the negative feedback is 1/50th. b) Noise voltage Any amplifier is said to have certain parameters. a) Sustained oscillation To determine: feedback voltage {V f} for negative feedback amplifier; Formula Used: V f = β * Vo V f = 0.03*(100*40*10-3) V f = 0.12V Therefore, the feedback voltage is 0.12V for given parameters of negative feedback amplifier. Explanation: A voltage shunt feedback amplifier forms a negative feedback because, any increase in the output signal results in a feedback signal into the inverting input causing a decrease in the output signal. d) Rs << Ri 10. Explanation: An oscillator is an amplifier with positive feedback. b) Varying amplitude 5. a) Zero c) Biasing the oscillator b) Infinity B. d) Reduces distortion Deane explores the concept of "amplifier". Therefore, to increase the amplitude level of biosignals amplifiers are designed. A new refinement is the 2k2 resistor between Tr7 and Tr8 emitters. (16) 5. i) Give a short note on crystal oscillator? What is the closed loop gain of the system in db with the addition of the negative feedback? In an oscillator if phase of feedback is same as that of oscillation waveform then feedback is called ___________ d) Rectify b) Generate Calculate the change in gain of the feedback amplifier. d) Power is generated by transistor itself Hence, the feedback is said to be negative. Answer: a. View Answer, 10. a) 34db b) Ro >> RL a) Input AC voltage View Answer, 4. d) 42db The CFA was invented by David Nelson at Comlinear Corporation, and first sold in 1982 as a hybrid amplifier, the CLC103. a) Resistive A pinoybix mcq, quiz and reviewers. d) Constant amplitude at low frequencies only d) Doesn’t need at higher frequencies b) Current controlled voltage source 1. d) Constant frequency By using positive feedback, the amplifiers can provide active termination (Figure 9 ). d) level of non-linear distortion changes sinusoidal a) Improves the signal-to-noise ratio at input c) Cannot be predicted a) Feedback d) Shunt d) Increasing amplitude of oscillation 3. Multiple Choice Questions and Answers on Transistor Tuned Amplifiers Multiple Choice Questions and Answers By Sasmita March 16, 2019 In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: 1. a) Prevent Join our social networks below and stay updated with latest contests, videos, internships and jobs! View Answer, 2. Sanfoundry is a free education & learning platform, for the global community of students and working professionals, where they can practice 1 million+ multiple choice questions & answers (MCQs), tutorials, programs & algorithms in engineering, programming, science, and school subjects. d) Either positive or negative depending upon frequency Hello fellows, I hope you all are doing great. a) Constant amplitude A feedback circuit usually employs which type of circuit? This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Properties of Negative Feedback”. a) More input impedance View Answer, 3. c) Both feedback and amplifier © 2011-2021 Sanfoundry. A Negative-feedback amplifier (or feedback amplifier) is an electronic amplifier that subtracts a fraction of its output from its input, so that negative feedback opposes the original signal. View Answer, 7. It discusses the effect of negative feedback on input impedance of the amplifier. Electronic Devices and Circuit Theory, Eleventh Edition, offers a complete, comprehensive survey, focusing on all the essentials you will need to succeed on the job. c) 30db In this version the input and driver stages from the MJR7 mosfet amplifier are used, with the input stage emitter resistor increased to 10R to reduce loop gain. a) Widens the separation between 3db frequency Nothing breaks the mood of live music more than the shrieking feedback that can come from an amp. A. Such amplifiers are defined as Bio Amplifiers or Biomedical Amplifiers. c) DC biasing voltage Which of the following conditions is responsible to drive a low resistance load by the current amplifier circuit? The AC power of output signal is obtained by ___________ An ideal OP-Amp Is an ideal ______________ Two non-inverting amplifiers, with gain =1 and gain=20 are made using identical operational amplifiers. To practice all areas of Electronic Devices and Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. Setting the standard for nearly 30 years, this highly accurate text is supported by strong pedagogy and content that is ideal for new students of this rapidly changing field. b) Damped oscillation All Rights Reserved. b) Inductive Scroll down for the list of popular topics or search below. (8) ii) Determine the voltage gain, input and output amplifier with feedback for Voltage series feedback having A =-100, Ri=10kO, Ro=20 kO and ß= -0.1 (8) 6. View Answer, 4. a) Current controlled current source View Answer, 3. Generalised Unilateral Feedback System The generalised feedback system is given in the block diagram of Figure 1. Electrical Engineering Multiple Choice Questions / Objective type questions, MCQ's, Engineering, Multiple Choice Questions, Objective type questions, Engineering short notes, rapid fire notes, best theory, Join our social networks below and stay updated with latest contests, videos, internships and jobs! Typical amplifier parameters are described below. Oscillator __________ an AC input for giving an AC output. The applied negative feedback can improve its performance (gain stability, linearity, frequency response, step response) and reduces sensitivity to parameter variations due to manufacturing or environment. … b) 0.06V a) DC voltage The output of a stable oscillator have ___________ View Answer, 10. 0 items - €0.00 c) Voltage controlled voltage source What would be the value of feedback voltage in a negative feedback amplifier with A=100; β =0.03 and input signal voltage = 40mv? If such an ADC is driven by a precision op amp whose bandwidth is much lower than the clock frequency, the op amp cannot develop sufficient feedback to provide a stiff voltage source to the ADC input port, and missing codes are likely to occur. d) No trigger is required View Answer, 6. b) Input DC voltage The current feedback operational amplifier (CFOA or CFA) is a type of electronic amplifier whose inverting input is sensitive to current, rather than to voltage as in a conventional voltage-feedback operational amplifier (VFA). c) External trigger voltage This is to null any distorted signal fed … d) Input voltage c) Variable frequency b) Need View Answer, 6. b) Improves gain stability It is very useful for high-precision signal processing. For accomplishing negative resistance in oscillator we use _____________ In this type of amplifier, feedback is the limitation which calculates the sum of feedback given in the following amplifier. c) Rs >> Ri advertisement. Generally, biological/bioelectric signals have low amplitude and low frequency. The forward path is G(jω). Multiple Choice Questions and Answers on Op-Amp ( Operational Amplifier ) Multiple Choice Questions and Answers By Sasmita January 9, 2020 In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: d) Unpredictable The output waveform of a stable oscillator have ___________ That output voltage is fed back to the - input of the op amp, as well as to the speaker. It discusses the effect of negative feedback on output impedance of the amplifier. The feedback-amplifier can be defined as an amplifier which has feedback lane that exists between o/p to input. © 2011-2021 Sanfoundry. The positive feedback makes the output resistor appear to be a larger value than it actually is when you view it from the line. Negative resistance are incorporated in oscillator for ___________ View Answer, 2. What happens to the non-linear distortion due to the initiation of the negative feedback? c) Constant amplitude at high frequencies only b) Negative feedback Call Us 057 8662611 / 057 8735269 087 2221384 Email Us info@vegasv2.com. This set of Analog Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Introduction to Oscillator”.
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