- #1
lennybogzy
- 94
- 0
I have a LT1394 comparator in a circuit that I'm trying to troubleshoot.
The problem is that once the variable voltage approaches the reference, just before a switch, the output signal oscillates between LO and HI.
I haven't been able to dive too deeply into it, to figure out if its noise or AC coupling on the variable IN, I'm also not a pro at this in any regard. Currently by raising the cap on the output by a factor of 10 I'm able to lower the oscillation but this is a band aid solution and doesn't fix the fundamental problem.
I know that the LT1394 has no built in hysteresis and assume that the resistor on the positive feedback path is what's going to control that for me. Should I lower it? Anything else I can do?
The problem is that once the variable voltage approaches the reference, just before a switch, the output signal oscillates between LO and HI.
I haven't been able to dive too deeply into it, to figure out if its noise or AC coupling on the variable IN, I'm also not a pro at this in any regard. Currently by raising the cap on the output by a factor of 10 I'm able to lower the oscillation but this is a band aid solution and doesn't fix the fundamental problem.
I know that the LT1394 has no built in hysteresis and assume that the resistor on the positive feedback path is what's going to control that for me. Should I lower it? Anything else I can do?