The function of the circuit depends on the internal resistance Rin of the signal source that is applied at the non-inv. input.
For a pure voltage source (Rin=0) the positive feedback path is useless.
I know - probably it will be not to important for ECE101, nevertheless it should be clear:
"Butterworth" is not a term describing any filter topology but rather a certain kind of transfer function response (of at least second order).
A lowpass of first order has one possible response only - there are no alternatives (except the gain).
But I agree, ECE101 should show the complete schematic including signal source circuitry and grounding (no open nodes).
<It seems to be a low pass filter but still what would be the purpose of the 2 resistors connected between the output, ground and non inverting input?>
One reason, hysteresis..
Thank you for your replies LvW,
This is the only schematic I was given.
Exactly as above, It was actually for a pop-quiz where it was asked to describe its function.
Hi ECE, to answer your question it is necessary to know about the parts values - in particular if positive dc feedback dominates or not.
(This point was also addressed by varunkant: hysteresis yes/no ?).