I hope the following simulation is what you need!
You can use sliders to change R1,R2, Vin.
Click invert to find the circuit type similar to your case!

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/operationalAmplifier_pkg/operationalAmplifier.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
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Download EJS jar file(1060.5kB):double click downloaded file to run it. (25 times by 17 users) , Download EJS source View EJS source