op amp as a comparator, comparator applications . View Answer, 12. Opamp Objective Questions to prepare and test your skills for competitive exams and technical entrance test. Zero crossing detectors is also called as There will be diodes connected back to back between inputs of many op amps, that may cause unpredicted current at inputs. If we connect a typical 741 op amp to a +/-18V, then the maximum output voltage is +/-15V. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Comparator”. Comparator diagrams and op-amp diagrams use the same symbols. b) To increase gain of op-amp This is because of extreme high open loop gain of the op amp (10,000 to 1 million). View Answer, 7. Which among the following is used to increase phase angle between different voltages? b) Use of positive feedback View Answer, 6. 7) The below drawn schematic of Op-amp 741 is configured in non-inverting mode with R1 = 2 K Ω, Rf = 20 K Ω, fo = 10 Hz & A = 4,00,000. A pinoybix mcq, quiz and reviewers. OP-AMP as Comparator ,Zero Crossing Detector,Non Zero Comparator , Sine wave to Square Wave comparator. In this circuit I am using the 741 op amp as a comparator to compare two voltages. Figure 4 shows a comparator circuit. Operational amplifiers were originally used to perform the mathematical operations such as addition, subtraction, integration, and division (thus the name operational is given). The output state of these op amp comparator circuits changes in less than 1 microsecond. C. a comparator with three trigger points. Basically a comparator is used in electronics to compare the two Analog input signals given on both input terminals and we get the Digital output as High level or Low level. Yet many designers still try to use op amps as comparators. a. Op amp never saturates; b. a) Time marker generator a) To reduce output offset voltage Op Amp Comparator Circuit In general, the output of the op amp swings positive and negative to a maximum voltage that is close to supply potentials. As a square wave generator: A comparator can be used to produce a square wave output from a sine wave input. Comparator as the name suggests compares two things. c) Sine to triangular wave generator op amp offset voltage. b) High frequency signal and noise at input terminal 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. Feedback loop is never opened; c. Output shape is the same as the input shape; d. Op amp may saturate; 2. c) Schmitt trigger Op amps takes more time to recover from saturation, as these are designed to operate in linear mode with negative feedback. d) External inductors or diodes are used d) To protect op-amp from damage View Answer, 15. These op amp comparator circuits are typically used in applications where low performance is acceptable. Comparators are often used, for example, to check whether an input has reached some predetermined value. a) Square to sine wave generator How the op-amp comparator should be choosen to get higher speed of operation? 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, 3. The comparator is used to sense when an arbitrary varying input signal reaches reference level or a defined threshold level. d) Voltage level detector c) Phase meter The only common op-amp application that uses the device in its original high-gain, differential-input configuration is the voltage comparator. The op amp comparator circuit is frequently used in many applications. But it’s easier said than done, because a comparator and an op amp, although similar, are different devices. 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. Once upon a time, long, long ago, computers were far different to those we know today. Comparator are help different circuit design; That is all for now I hope this article would be helpful for you. d) All of the mentioned c) To reduce input offset current In this article, we will discuss about how to use an op amp as a comparator. 1. An external hysteresis is always required for slow moving inputs, op amps doesn’t have any internal hysteresis. In this section of Electronic Devices and Circuits.It contain Operational Amplifiers (OP AMPS) MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the … 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. 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