Archive of the former Yahoo!Groups mailing list: MOTM

Ok, off topic question about schematics and Op Amps.

I have seen a lot of schematics that involve Op Amps, yes they seem to
make the world go 'round. I am no expert on schematics. but one thing
is troubling me.

I see these lovely OpAmps connected with the + input, - input and the
output. Many times I don't see any other connections. Now I am
pretty sure that these things take V+ and V- (to the chip) to make
them run, but they don't show on the schematics.

Are these connections just assumed? Or are there real ways to use
OpAmps with just the 2 inputs and the output with no power applied?

Thanks in advance for the answers.

Bruce