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Discussion Starter #1 (Edited)
Anyone know about op amps? I have a homework assign and test next week on these (no text book with class) and have to figure out how they work. More specifically, I need to find the output voltage of a differencing op amp with a set input voltage with resistors in the 1000 ohm range giving a gain of 3.5 and the output voltage with resistors on the 10000 ohm range and same gain. It has been pointed out to me that the outputs will not be the same even with the same gain due to the resistances. If anyone knows these well, I'll post up the exact problem. Tia

Joe

Edit: Here are the figures and a better wording of the problems

http://www.cardomain.com/ride/475245/9
 

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Google is your friend here. Op amps are fairly easy, especally if you are only dealing with one, but just a couple formulas to memorize.
 
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