# reply please how to solve this op amp its not even connected to output so plz tell me how

Discussion in 'Homework Help' started by Zulkifal, Feb 6, 2016.

## what type of op amp is it

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1. ### Zulkifal Thread Starter New Member

Feb 5, 2016
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its not connected to output voltage

Moderators note: removed white space and shown as full image

Last edited by a moderator: Feb 7, 2016
2. ### WBahn Moderator

Mar 31, 2012
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So you have a poll that asks if the op amp is an op amp or an op amp.

Good luck on getting any useful information from your poll.

As for the question posted in the screenshot, what is the output of an op amp in terms of the input voltages, taking into account the limits imposed by the supply voltages?

Or are you just looking for someone to give you the answer?

3. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,504
512
It says that you are supposed to figure out the output voltage.

4. ### shteii01 AAC Fanatic!

Feb 19, 2010
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Q1.
Can you tell me the voltages that are used to power the op amp?
(Clue 1: there are two of them, so your answer must contain two voltages)
(Clue 2: in some places these voltages are called rails, they provide the upper and lower boundaries (rails) for the output, the output can not exceed the upper boundary (rail) and the output can not go lower than the bottom boundary (rail))

5. ### Zulkifal Thread Starter New Member

Feb 5, 2016
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0
Sorry for that I am new at here so i didn't know how the pole works i want to know what type of op amp is it.

6. ### Alec_t AAC Fanatic!

Sep 17, 2013
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What have you learnt so far about inverting and non-inverting amplifiers?

7. ### Zulkifal Thread Starter New Member

Feb 5, 2016
9
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I know those op amp with negative feed backs tell me what type of this amplifier is so i could read about it also refer me book plz.

Apr 5, 2008
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9. ### Zulkifal Thread Starter New Member

Feb 5, 2016
9
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thanx alottt god bless you

10. ### WBahn Moderator

Mar 31, 2012
18,087
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Since no specifics are given, you have little choice but to assume that it is an ideal op amp.

In order to determine the output of the circuit of which this op amp is a part of, you just need to know what the output of an op amp is as a function of the voltages at its two input pins.

What is that relationship? If you don't know, then look it up.

Mar 31, 2012
18,087
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12. ### WBahn Moderator

Mar 31, 2012
18,087
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Why are you setting up a poll at all?

Apr 5, 2008
15,803
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Hello,

@WBahn, Now I see it too, there is no feedback at all.

Bertus

14. ### WBahn Moderator

Mar 31, 2012
18,087
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Yeah, it's pretty easy to miss since the layout is so similar to a negative feedback amplifier.

15. ### Zulkifal Thread Starter New Member

Feb 5, 2016
9
0
i didn't know about the comparator circuit I am reading about it and sorry for the pole.

16. ### WBahn Moderator

Mar 31, 2012
18,087
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It's "poll", not "pole". Look up both words to learn the difference.

You shouldn't need to look up what a comparator circuit is or what it does. You have an op amp circuit that is very easy to analyze simply by understanding the fundamental concept of an opamp as being a very high gain differential amplifier.

17. ### atferrari AAC Fanatic!

Jan 6, 2004
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Wasn't him expected to find out that finally by himself? Homework section.

18. ### WBahn Moderator

Mar 31, 2012
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That's what I was hoping, but there were too many responses that were assuming it was something else that I figured it might be leading him astray.

19. ### atferrari AAC Fanatic!

Jan 6, 2004
2,666
784
Sorry William, I recognize how much the regulars do to help.

I should have refrained to post that. Not the best qualified to judge, much less to preach them.

20. ### WBahn Moderator

Mar 31, 2012
18,087
4,917
Oh, no problem at all. I waffled a bit on being that explicit, but finally opted to go ahead and be so. Judgment call.