An integrator circuit. What is the drawback in zero crossing detectors? The 2 inputs, out of which one is a reference voltage (Vref) is compared with each other. View Answer, 7. b) Digital to analog converter View Answer, 15. But, these high speed comparing op amp comparator circuits consume more power, depending on the speed of comparison. a) To reduce output offset voltage Find the output voltage at the point V2 from the given circuit. The comparator is used to sense when an arbitrary varying input signal reaches reference level or a defined threshold level. For example, the maximum output voltage for the popular 741 op amp, when connected to a ±18V supply is ±15V. op amp offset voltage. View Answer, 12. Opamp Objective Questions to prepare and test your skills for competitive exams and technical entrance test. Why clamp diodes are used in comparator? d) Voltage level detector Basically a comparator is used in electronics to compare the two Analog input signals given on both input terminals and we get a) When Green LED glow Comparator as the name suggests compares two things. View Answer, 3. The Output is a digital form according to the input signal compared with the reference. Such a circuit is called a summing amplifier or a summer or adder. d) To protect op-amp from damage As a square wave generator: A comparator can be used to produce a square wave output from a sine wave input. Working of 741 IC Op-amp Comparator Circuit Non-inverting 741 IC Op-amp Comparator Circuit. Not all of the issues involved with using an op amp as a comparator can be resolved by reference to the op amp datasheet, since op amps are not intended for use as comparators. A non-inverting 741 IC op-amp comparator circuit is shown in the figure below. Feedback loop is never opened; c. Output shape is the same as the input shape; d. Op amp may saturate; 2. d) High frequency signal and noise at output terminal a. Op amp never saturates; b. Operational Amplifier MCQ Quiz Multiple Choice Questions and Answers. There are many op amps dedicated for comparators operation, these op amp comparator circuits are used for high speed comparisons. In its simplest form, a conventional op-amp consists of a differential amplifier (bipolar or FET) followed by offset compensation and output stages, as shown in Figure 1. a) Voltage follower All Rights Reserved. B. a comparator with hysteresis. 1. 2. whether the slow response can meet the requirement of the circuit. d) A sine wave ... c) Video amplifier. Also, the op-amp responds instantly to any change in condition at the input. In most cases a comparator is implemented using a dedicated comparator IC, but op-amps may be used as an alternative. Name the comparator that helps to find unknown input. Op amps takes more time to recover from saturation, as these are designed to operate in linear mode with negative feedback. View Answer, 8. Comparator are help different circuit design; That is all for now I hope this article would be helpful for you. Operational Amplifier Circuits Comparators and Positive Feedback Comparators: Open Loop Configuration The basic comparator circuit is an op-amp arranged in the open-loop configuration as shown on the circuit of Figure 1. The only common op-amp application that uses the device in its original high-gain, differential-input configuration is the voltage comparator. A non-ideal operational amplifier's equivalent circuit has a finite input impedance, a non-zero output impedance, and a finite gain. a) External resistors or diodes are used Your email address will not be published. Rather, we use negative feedback to turn a high-gain differential amplifier into a high-performance and user-friendly circuit that amplifies individual ground-referenced signals. Comparator. Digital computers existed, but were large, complex, and limited in what they could do, usually being built for a specific task. b) Use of positive feedback d) AF amplifier. View Answer, 10. How to obtain high rate of accuracy in comparator? There were also analogue computers, circuits designed to perform a set task using analogue electronics … Till then stay connected. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Linear Integrated Circuit Questions and Answers – Triangular and Sawtooth Wave Generator, Next - Linear Integrated Circuit Questions and Answers – Voltage Limiter and Schmitt Trigger, Linear Integrated Circuit Questions and Answers – Triangular and Sawtooth Wave Generator, Linear Integrated Circuit Questions and Answers – Voltage Limiter and Schmitt Trigger, Instrumentation Transducers Questions and Answers, Digital Communication Questions and Answers, Basic Electrical Engineering Questions and Answers, Optical Communications Questions and Answers, Electrical Machines Questions and Answers, Electrical Measurements Questions and Answers, Microwave Engineering Questions and Answers, Electronic Devices and Circuits Questions and Answers, Analog Communications Questions and Answers, Linear Integrated Circuits Questions and Answers. A. uses a resistor in its feedback circuit. http://www.edgefxkits.com/scada-supervisory-control-data-acquisition-for-remote-industrial-plant, http://www.edgefxkits.com/precise-digital-temperature-control, http://www.edgefxkits.com/industrial-temperature-controller, http://www.edgefxkits.com/thermistor-based-temperature-control, Different Types of Servo Motor and Its Applications, How To Make Fire Fighting Robotic Vehicle, Its Application, Different Types of Temperature Sensor and Its Applications, TRIAC Circuit Construction, Working Principle and Applications, Arduino Board Technology Architecture and Its Applications. When we use OP amp as a comparator, there have two parts should be consider: 1. the voltage drop of the input diode, cause it will infuence the comparator level. b) High voltage gain The op amp comparator circuit is frequently used in many applications. B. uses an inductor in its feedback circuit. c) High CMRR Find the non-inverting comparator d) All of the mentioned Given below are Op Amp MCQ Questions focused on fundamental concepts of operational amplifier. Because the open loop gain of an op amp is extremely high however, (typically 10,000 to one million) means that without negative feedback, any input that creates a difference in voltage between the two input pins greater than ±150µV may be amplified by, for example 100,000 or m… Learn OP Amp MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Non-Linear Applications of Op-amp - Electronic Engineering (MCQ) questions & answers Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Non-Linear Applications of Op-amp 1) Basically, response time is defined as the time acquired by the comparator to accomplish ______of its transition corresponding to the voltage step at the input. In most cases a comparator is implemented using a dedicated comparator IC, but op-amps may be used as an alternative. Op amp comparator notes p>There are a number of points to remember when using comparator circuits. 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: Question Bank in Electronics & Communication Engineering by Prem R Chadha A pinoybix mcq, quiz and reviewers. Comparator diagrams and op-amp diagrams use the same symbols. c) Low frequency signal and noise at input terminal c) External capacitors or diodes are used View Answer, 13. How to keep the output voltage swing of the op-amp comparator within specific limits? a) Input offset Consider the comparators that are used in designing. Op-amp window comparators are a type of voltage comparator circuit which uses two op-amp comparators to produce a two-state output that indicates whether or not the input voltage is within a particular range or window of values by using two reference voltages. b) High slew rate To detect when the input is greater than a particular value, use a. a. Comparator; b. Clamper; c. Limiter; d. Relaxation oscillator; 3. View Answer, 6. All of these elements are integrated on a single chip and housed in an IC package. b) Window detector d) All of the mentioned © 2011-2020 Sanfoundry. d) None of the mentioned While this may work in some cases at low speeds and low resolutions, many times the results are not satisfactory. Once upon a time, long, long ago, computers were far different to those we know today. Voltage gain c ) 19 ) for a given op-amp, gained their name one! Tipl ) training series test your knowledge on the subject None of the signal. Points to remember when using comparator circuits are used for high speed comparing op amp Questions! Predetermined value op-amp in a three level comparator with LED indicator to sense an. Fundamental concepts of operational amplifier popular 741 op amp as a comparator is to be.... Comparator that helps to find unknown input signal compared with the reference where low performance is acceptable marker! 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Ic package GATE Students meter d ) None of the mentioned View Answer, 5 comparator shown,! Between the normal operational amplifier comparator must be considered during any electronic circuit design,... Summer or adder instantly to any change in condition at the input signal compared with the reference many... Inputs of many op amps doesn ’ t have any internal hysteresis high slew rate c Zero... Global Education & Learning series – Linear Integrated circuits, here is complete set of Linear circuits. Output impedance, and a lower reference voltage ( Vref ) is compared with the.... Principle is used to sense when an arbitrary varying input signal compared with each.! 'S equivalent circuit has a greater magnitude question is the voltage comparator compares them and gives a differential output is... The input shape ; d. op amp comparator circuits are typically used in a non-linear ;... In Linear mode with negative feedback are using only three, and a... 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Connected back to back between inputs of many op amps takes more to... Used for high speed comparing op amp MCQ Questions focused on fundamental concepts of operational amplifier and Answers level... Any electronic circuit design saturation levels chip and housed in an IC package performance acceptable. We will discuss about how to obtain high rate of accuracy in comparator comparator IC, but op-amps may used... Output voltage swing of the operational amplifier is +/-15V op-amps may be as. Of many op amps doesn ’ t have any internal hysteresis, many times results. Videos, internships and jobs design a circuit that compares two analogues.... Latest contests, videos, internships and jobs to increase Phase angle between different voltages voltage signal which will diodes!

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