It's an non-inverting schematic....
]It's not something that I really got out of my head.... I once used a resistor in the same configuration
for an voltage comparator circuit.... to boost the output.... So I guessed that would be ok.....
It is not an inverting amp.
I rearranged your circuit to make it more clear. Your circuit on the left, the real inverting amp on the right:
When using a comparator (not an op-amp) you sometimes have to use a pull up, since some comparators has got an open collector output (same as if you had a loose NPN transistor with the emitter to Gnd, driven from the base and with the collector just sitting there).
On an op-amp, you just load the output by placing a pull up (or pull down) resistor.
What did you do to solve it and what is the new problem?
Admin <- why are images shrinked a wee bit in the posts, making the semi-unintelligible?