# electronics question

Discussion in 'Homework Help' started by Marah, Apr 21, 2012.

1. ### Marah Thread Starter New Member

Apr 14, 2012
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0
hello , i have a home work in electronics and i cant answer this question :

Draw the basic configurations of the op-amp and write expression for the gain in each case

thanks you

2. ### hgmjr Retired Moderator

Jan 28, 2005
9,029
219
Go to our AAC ebook at www.allaboutcircuits.com and search for opamps. You should be able to find the answers you seek there.

hgmjr

3. ### WBahn Moderator

Mar 31, 2012
24,562
7,700
You can't even come up with one? Not one? If I were to ask you to draw the simplest op amp circuit you could think of, could you come up with something and tell me the gain?

This question sounds like it is going to be somewhat specific to how your course was presented, since there is no hard fast rule of what a "basic configuration" of an op amp is. In fact, there are only three opamp circuits that come to mind as being ones that I would expect to be in any course and described as "basic" configurations. I can think of others that I would expect to see in most courses, but I don't know whether they would be described as being "basic" configurations, or not. Go back through your course notes or the text to see which op amp circuits are presented as being basic or foundational.

Apr 30, 2011
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There are plenty of op amp basics for the Googling but I'll give three hints: 1, +, -.

5. ### WBahn Moderator

Mar 31, 2012
24,562
7,700
Those are the three I was thinking of!

Actually, I guess I could say a fourth, namely oo (infinity). But I don't know that I would classify that as a basic configuration if I were teaching the course. It's certainly simple, but it is nonlinear and this strikes me as a problem from a linear circuits course.