Op amp is operational amplifier. Operational amplifier are use in ADC, zero crossing detector ,DAC, filters, Voltage regulators, Current regulators, etc.
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
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
Last Answer : Answer: A
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.
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.
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.
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.
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.
An OP-AMPs can amplify _______ (a) D.C (b) A.C (c) both A.C & D.C (d) none of above
Last Answer : b) A.C
Last Answer : 1
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.
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
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).
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.
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
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
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
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
Does an OP I posted ring a bell as the same one you heard from an interviewer?
Last Answer : Um…here?
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.
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.
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.
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.
What question (OP) does the answer "How about calling non-minor females "girls"? remind you of?
Last Answer : https://www.fluther.com/203908/is-there-some-other-freedom-thats-more-important-than-driving-for/ You can search your own responses on your profile page.
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?
Last Answer : You can only lead a horse to water…
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.
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?
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.
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
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.
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.
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?
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?
Last Answer : WTH…are you talking about?
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.
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.
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.
What are your thoughts when an OP asks for only certain types of jellies to answer their question?
Last Answer : I don’t think that the questioner has the right to restrict who answers a question.
Is it good etiquette to use GQ and GA lurve to help the OP have a reference point for a popular thread?
Last Answer : I gave you a GQ because I want you to come back and explain this question to me. I have a pretty simple mind~.
What items can I buy from the health food co-op to feel better?
Last Answer : Yams. I think there is also a progesterone cream you can get over the counter.
How does a question get closed after three responses? Who decides when to close a thread - the OP, the mod, both?
Last Answer : answer:It's almost always a mod decision, and why we do it depends on the question. There was one today posted by a (banned) returning troll that we pulled (and closed) after three responses. ... it not only removes the asker's question, but all of the contributions made by those that answered it.
Has anyone else dated a M2F Pre Op Transgenger , and not been told the truth until FAR into a intimate relationship?
Last Answer : ooops….I meant at the top of my answer…...that “I wasn’t given the right to decide whether or not I WOULD DATE a transgender person….....the truth was kept from me, until almost a year into the relationship.
I put myself as a OP on a server for minecraft and none of the commands are working what do I do?
Last Answer : answer:Make sure you’re putting the / before your server commands, of course. Otherwise, try and restart the server. Some changes like enabling monsters take time and a few restarts occasionally.
When you use the @user function to refer to the OP, why does it always take you to the top of the page?
Last Answer : Because they are the questioner. I never click on that when I am addressing them so I don’t ever go to the top of the page.
What similar classical pieces that sound like Frederic Chopin Piano Concerto No.2 in F minor Op.21?
Last Answer : You may like Rachmaninoff’s Prelude op 3. no. 2 – hope you’ve got a wide stretch though… The agitato passage in the middle sounds great played fast :-)
For those of you who have jobs that require you to check ID's, what do you do if you encounter a post-op transexual?
Last Answer : This is soooo hypothetical. If, on the rare chance that you are exposed to this situation, take your supervisor’s advice and don’t worry about it.
What does OP stand for, in reference to someone asking a question?
Last Answer : Original post or original poster
How do you feel when you wrote good answer but the OP didn't care/give you a score?
Last Answer : I don’t answer questions for lurve, so it doesn’t matter to me. Don’t get me wrong, the feedback is nice, but I don’t worry about it.
Should the OP be the only one who decides where a question is posted?
Last Answer : Moderators often ask the OP if he/she wants the question moved if there are a lot of humorous or off-topic answers. If the OP wishes for the question to be moved, we move it. If not, we ... , any question about ask-public or a ask-public member is automatically moved to Meta, no matter the topic.
Co-op food market, independent grocer, or chain-store?
Last Answer : answer:Chainstore would most typically carry a wide assortment of goods, including organic products. Prices at chainstores would tend to be less expensive than independent grocers as they have the economies of scale ... cater to a special crowd. Needless to say, I am not part of the special crowd.
What was the point of taking Co-op Campaign out of Resistance 2?
Last Answer : There’s no telling. I’ve never heard of the game.. what console or is it pc? The director may have just thought it was an antiquated feature.