Differential Opamp.
Here is the set up for an opamp set to differential mode.
[kml_flashembed movie=”http://www.helpmyphysics.co.uk/opamp_diff.swf” height=”450″ width=”550″ /]
This set up amplifies the difference between the two voltages.
Looking at the input and feedback resistors we have:
Click the green arrows of V2 and V1 and check out that the difference between V2 and V1 is multiplied by 2.
This is an example of a differential amplifier.
Categories: Higher Physics
23May