Hello, I'm trying to use a 0-5v signal from a car's sensor into a comparator. However, there's noise on the signal feed. I've acttached pictures of the noise in question. Multi-meter reads 1.89v. I need ~1.89v into the comparator (which varies as sensor works). The sensor is a Manifold Absolute Pressure sensor. The measurements below are at atm.
The issue I'm having is as the signal gets close to the Ref V on the comparator, is falsely triggers the comparator on/off a wide range around ref V.
I quickly tried a 0.1uF cap on signal line to gnd, and then a resistor in series with signal. No change.
Main Time/Div = .2
Vol / Div = .2
Thanks,
Rey
Noise:
The issue I'm having is as the signal gets close to the Ref V on the comparator, is falsely triggers the comparator on/off a wide range around ref V.
I quickly tried a 0.1uF cap on signal line to gnd, and then a resistor in series with signal. No change.
Main Time/Div = .2
Vol / Div = .2
Thanks,
Rey
Noise: