Non-inverting Operational Amplifier

Op-Amp as current source

An Op-Amp can not only amplify voltages and currents, it can also act as a current source itself. Here is the schematic of a typical Op-Amp current source:




Fig. 1: Non-inverting Op-Amp: current source

$U_{\rm DD}{\rm~=10~V},~U_{\rm SS}{\rm~=-10~V},~R_{\rm 1}{\rm~=100~k\Omega},~R_{\rm 2}{\rm~=10~k\Omega},~R_{\rm 3}{\rm~=100~\Omega}$








Measure the values given in the table below.

Why does the current remain constant at the output of the Op-Amp?
Give a brief explanation of the circuit's operating principle.


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