I'm looking at the PmodLS1 schematic, specifically at the LMV324MT op amps (IC3B, IC3A, IC3D, and IC3C). It looks like these op amps are not hooked up with any negative feedback. (There is positive feedback, through the 100-kOhm resistors, which would be fine if there were negative feedback also, but there isn't any.) I checked the LMV324MT datasheet against the pin numbers shown in the LS1 schematic, and yes, these are the right pins, and the feedback is positive only.
Doesn't this mean the device should not work at all? What am I missing?
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Les Moore
I'm looking at the PmodLS1 schematic, specifically at the LMV324MT op amps (IC3B, IC3A, IC3D, and IC3C). It looks like these op amps are not hooked up with any negative feedback. (There is positive feedback, through the 100-kOhm resistors, which would be fine if there were negative feedback also, but there isn't any.) I checked the LMV324MT datasheet against the pin numbers shown in the LS1 schematic, and yes, these are the right pins, and the feedback is positive only.
Doesn't this mean the device should not work at all? What am I missing?
Thanks
pmodls1_sch.pdf
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