# What are op amps used for?

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Op amp is operational amplifier. Operational amplifier are use in ADC, zero crossing detector ,DAC, filters, Voltage regulators, Current regulators, etc.

## Related questions

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Description : Draw the circuit diagram for Instrumentation amplifier using three OP-AMPs. State its advantages and applications.

Last Answer : Application: 1. In Data acquisition from low output transducers such as strain gauges, Thermocouples, Wheatstone bridge measurements e.t.c 2. In Medical instrumentation, Navigation, Radar ... video data acquisition and imaging 5. High frequency signal amplification in cable RF systems

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Description : The three devices which make up the circuit shown in the illustration are ____________. EL-0087 A. flip-flops B. exclusive 'OR' gates C. summing op amps D. function generators

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Description : How frequency to voltage converted on OP-AMPS.

Last Answer : A Frequency to voltage converter produces an output voltage, whose amplitude is a function of frequency of the input signal. The input signal may be a sinewave, a square wave or a pulse train. The F/V converter is essentially an FM detector or discriminator.

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Description : Mention some of the non – linear applications of op-amps

Last Answer : Rectifier, peak detector, clipper, clamper, sample and hold circuit, log amplifier, anti –log amplifier, multiplier are some of the non – linear op-amp circuits.

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Description : Mention some of the linear applications of op – amps.

Last Answer : Adder, subtractor, voltage –to- current converter, current –to- voltage converters, instrumentation amplifier, analog computation ,power amplifier, etc are some of the linear opamp circuits.

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Description : What is the need for frequency compensation in practical op-amps?

Last Answer : Frequency compensation is needed when large bandwidth and lower closed loop gain is desired. Compensating networks are used to control the phase shift and hence to improve the stability.

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Description : In practical op-amps, what is the effect of high frequency on its performance?

Last Answer : The open-loop gain of op-amp decreases at higher frequencies due to the presence of parasitic capacitance. The closed-loop gain increases at higher frequencies and leads to instability.

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Description : An OP-AMPs can amplify _______ (a) D.C (b) A.C (c) both A.C & D.C (d) none of above

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Description : Define the following terms related to Op-Amp: i) CMRR ii) SVRR

Last Answer : Definition:- i) SVRR: It is defined as the ratio of change of input offset voltage to the change in one supply voltage while keeping other supply voltage constant. Ideally,SVRR=0  ii)CMMR:-The ... gain should exceed common-mode gain, this will be a positive number, and the higher the better.

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Description : State any two characteristics of an ideal Op-amp.

Last Answer : Characteristics of Op-amp: i) Input offset voltage ii) Input offset current iii) Input bias current iv) Differential input resistance v) Input capacitance vi) CMRR-common mode rejection ration vii) ... voltage rejection ratio(SVRR) viii) Output resistance ix) Voltage gain x) Bandwidth xi) Slew rate

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Description : Draw and explain the Op-amp based subtractor

Last Answer : Working The subtractor circuit is a basic op-amp circuit whose output voltage is the difference between two input voltages.  In the above circuit, the two input voltages are V1 and V2.  The op amp is used ... When differential gain is 1, ie Rf = R,  the output voltage is Vo = (V2 - V1).

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Description : Draw the diagram of zero crossing detector using op-amp and explain its working.

Last Answer : The zero crossing detector circuit is an important application of the op-amp comparator circuit. It can also be called as the sine to square wave converter. Anyone of the inverting or non-inverting ... the possibility of any false zero crossing due to noise voltages at the op-amp input.

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Description : An OP amp has an open loop gain of 1,00,000. If the feedback fraction is 0.02, the approximate closed loop gain is (a) 1 (b) 1,00,000 (c) 50 (d) 0.02

Last Answer : The closed loop gain Ag = G/(1+G*f) Where G is the open loop gain and f is the feedback fraction  So Ag = 49.975

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Description : An OP amp has a slew rate of 1V/µs. At a signal frequency of 0.1 MHz, the maximum undistorted sine wave amplitude is (a) 8V (b) 4.82 V (c) 2.02 V (d) 1.592 V

Last Answer : Slew rate = 2πfv where v is the amplitude V=(1/2π*0.1) = 1.592V

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Description : An op-amp having a slew rate of 62.8 V/msec, is connected in a voltage follower configuration. If the maximum amplitude of the sinusoidal input is 10 V, then the minimum frequency at which the slew rate limited distortion would set in at the output is  (A) 1 MHz (B) 6.28 MHz (C) 10 MHz (D) 62.8 MHz

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Description : What is the Output voltage of Op-amp for input voltage of Vi1=150 μV,Vi2=140 μV if the amplifier has differential gain of Ad=4000 and value of CMRR is 100.

Last Answer : i don know

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Description : A ball of mass 2kg hangs in equilibrium from two strings OP and OQ as shown. Calculate the tension in OP and OQ.

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Description : Two particles A and B are projected from point O with same speed u at angle θ1 and θ2 with horizontal. Both particles pass through a point P at a distance r from O. Line OP makes an angle α with the horizontal. tA and tB is ... by A and B; then tA tB is proportional to (1) 1/r (2) 1/r2 (3) r (4) r2

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Description : OAB is a right angled wedge fixed to ground as shown in Fig. A ball is projected with a speed v0 at an angle of 60° with horizontal from O. The ball hits wedge at point P. Then OP is (1) $$\frac{V^2_0}{2g}$$ (2) $$\frac{2v^2_0}{g}$$ (3) $$\frac{2v^2_0}{3g}$$ (4) $$\frac{2v^2_0}{3\sqrt{3}g}$$

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Description : A heavy point mass m is suspended by a light string of length 'l' from a point O. The particle in initial position A is given an initial horizontal velocity v0 . The mass rises to a point P where OP makes an angle θ with verticle. The ... }}\) (3) $$[gl(2-\sqrt{3})]^{\frac{1}{2}}$$ (4) $$\sqrt{gl}$$

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Description : PQ and RS are two perpendicular chords of the rectangular hyperbola xy = c2. If O is the centre of the rectangular hyperbola, then product of the slopes of OP, OQ, OR and OS is (a) –1 (b) –2 (c) 1 (d) 2

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Description : Create the following ledger with opening balance : LIST OF LEDGERS OP.BALANCE Dr Cr Capital account A'sCapital 2,50,000B'sCapital 17,50,000C'sCapital 10,00,000Reserves & Surplus ... ICICIODA/c 1,50,000 Loans & Advances : PrepaidInsuranceMotorCar 10,000 PrepaidInsuranceStock 15,000

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Description : If O is the origin and OP, OQ are distinct tangents to the circle x2 + y2 + 2gx + 2fy + c = 0, the circumcentre of the triangle OPQ is a. (–g, –f) b. (g, f) c. (–f, –g) d. none of these

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Description : A monochromatic light ray, OP, is incident on face AB, near the vertex, B, at an angle of 60° , as shown in Fig. Refractive index of the material is √3 . Which of the following statements is ... ray and the emergent ray is 90° (4) The angle between the incident ray and the emergent ray is 120°

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Description : A spherical glass surface, of radius of curvature R, seperates air (refractive index 1.0) from glass (refractive index 1.5). The centre of curvature of the glass surface lies in glass. A point object, P, placed in air, is found to form ... = PQ. The distance, OP, is (1) 5 R (2) 3 R (3) 2 R (4) 1.5 R

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Description : In Fig, CP represents a wave front and AO and BP are two rays corresponding to this wave front. The condition, for constructive interference, at P, between ray BP and ray OP, is (1) cosθ = $$\frac{3λ}{2d}$$ (2) cosθ = $$\ ... 3) (secθ - cosθ) = \(\frac{λ}{d}$$ (4) (secθ - cosθ) = $$\frac{4λ}{d}$$

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Description : Through a point P(f, g, h) a plane is drawn at right angles to OP, to meet the axes in A, B, C. If O is (0, 0, 0) the centroid of $$\triangle$$ ABC is (a) $$\left(\frac f{3r},\frac g{3r} , \frac h{3r}\right)\ ... \right)$$ (d) $$\left(\frac {r^2}{3r^2},\frac {g^2}{3r^2} , \frac {h^2}{3r^2}\right)$$

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Description : O is a point inside a tetrahedron ABCD. If AO, BO, CO, DO are produced to cut the opposite faces P, Q, R, S respectively, then $$\sum \frac{OP}{AP}$$ = (a) 4 (b) 3 (c) 2 (d) 1

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Description : Which combination of pressures makes a cell full turgid? (a) TP + WP (b) OP -TP (c) SP + OP (d) WP + SP

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Description : Does an OP I posted ring a bell as the same one you heard from an interviewer?

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Description : How do you post an OP that is not too vague, and not leading?

Last Answer : You could submit your future questions to a mod. Before you submit on Fluther.

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Description : If a question is from a new user and the first answer is spam, don't you suspect that the OP is spam?

Last Answer : But of course.

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Description : What is within an OP (question) when you're using the search engine in Fluther?

Last Answer : It’s how bold text gets displayed when there is a syntax error or when using an interface that doesn’t display bold text.

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Description : When an OP is found out to be a troll, does an otherwise good question just disappear?

Last Answer : Edited to add: I need an example of a troll or “troll” question that also happens to be a good one. I find it’s subjective sometimes.

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Description : What question (OP) does the answer "How about calling non-minor females "girls"? remind you of?

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Description : What is the best way to get extra clarification on a question, when you feel like you can't give a thoughtful answer without more information from an OP?

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Description : Have you ever read a question on Fluther and have not been able to figure out what the OP wanted to know?

Last Answer : Huh? ~ Seriously, though, there are plenty of questions that are asked in confusing ways. Ideally, they get sent back to the asker for clarification, but that's only going to happen if a moderator notices ... question right is the first step in getting an answer, but that first step can be a doozy.

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Description : Why do some users give opinions in the general section when the OP is asking for facts?

Last Answer : answer:My feeling about your question would be different if you had linked to a question of another user. But you linked to your question so I have my reason to suspect that this question has ... don't you at least appreciate that they cared enough to take their time to answer your questions?

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Description : Which page in ask-public has the info about how much time to edit the OP and the answer?

Last Answer : I don’t think it’s mentioned anywhere in the Help section. But if you were wondering, the edit window is 10 minutes.

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Description : If someone asks a question, and you answer that question honestly, even though the answer might upset the OP, should you refrain from answering honestly?

Last Answer : answer:I agree, sometimes calling a spade a spade is the only way to go. If the Jerk fits, and all that. Jerk is pretty mild when it comes to name calling. I think it has to do with A. Who the ... grievance just looking for a cause is okay as long as the word you is not used as an intro. haha

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Description : What did I do in the following OP that the formatting didn't work?

Last Answer : answer: No need for harsh chemicals Front-load washing machines eliminate the need to add bleach or other harsh chemicals to get your clothes clean. High-efficiency laundry detergents use a higher concentrated formula ... , insert the commands again at any break in the text and see if that fixes it.

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Description : Do you ever post an answer to a question knowing full well that the OP will not take the advice?

Last Answer : answer:No. I answer the question with the hope that the OP can get something useful from me, and that I can put my point across in an argument. I can be persistent but only for certain time. If I see that ... tiring and what they want us to do is to feed them. No need to waste my time on a troll.

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Description : Why do you answer a question without reading the details and responses from the OP?

Last Answer : answer:Why do you answer a question without reading the details and responses from the OP? Sometimes I don't, because I think the questions are too obvious to read further details. It's painfully ... Are you really curious? Or have someone here pissed you off because they didn't read your details?

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Description : If a question asked doesn’t carry a disclaimer stating it's for information only, should one view the question as having something personally to do with the OP?

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Description : What is the best co-op PC game for 4 players?

Last Answer : Well if you like zombie games, give Dead Island a shot. You can have four players here too, plus the sequel Riptide is out. Pretty fun and intense open world zombie game.

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Description : How do I isolate the last image in the following site in order to post an OP about it?

Last Answer : Right click the image you want and click “view this image” from the menu. It will open it up in another tab and you can copy the link and post it here.

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Description : What do you think about this op-ed piece about North Korea suggesting the U.S. bomb North Korea before it bombs anyone?

Last Answer : It’s stupid warmongering crap basically. Most experts believe that although there is good evidence that they have developed viable warheads they are far from being able to develop a viable delivery system.