Connect with us


Discussion in 'Electronics Homework Help' started by vick5821, Nov 2, 2012.

Scroll to continue with content
  1. vick5821


    Jan 22, 2012
    Dear all,

    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
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    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: Nov 2, 2012
  3. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    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.
  4. vick5821


    Jan 22, 2012
    The resistor act as the potential divider ?
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day