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Op-Amp

vick5821

Jan 22, 2012
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Dear all,
Untitled-4.png


I want to ask, what is the purpose of those resistor in the inverting and non-inverting op-amp ? What actually op-amp does ? Op-amp = comparator? Any differences ?

Thank you
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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The equation for an op-amp is Vo = A(V+ - V-)

You should have fun in class with this equation seeing what happens when A gets very large.

You really should look at those equations and find your own way to determining what those 2 resistors do.
 
Last edited:

Harald Kapp

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Nov 17, 2011
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An OpAmp is an amplifier which amplifies the voltage difference between the "+" input and the "-" input. The open-loop gain of the OpAmp is very high. so feedback is needed to bring the gain into a usable range.

This is a basic explanation of the operation of OpAmps.

I recommend this free PDF for in-depth studies.
 
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