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Noise is an unwanted disturbance in an electrical signal. This tag is for questions about sources of noise, noise types, issues caused by electrical noise, or improving the signal-to-noise ratio of an analog circuit.

1 vote
1 answer
1k views

Low pass filter vs low noise regulator

Why are there so many ultra low noise ldo’s when you can just filter the output as much as you want. I feel like I’m missing something. … I’m trying to get rid of noise below 70 Hz. Should I just bump up this capacitor to a much bigger one? …
user1416658's user avatar
3 votes
1 answer
201 views

Would leakage through a JFET create thermal noise

Would this impedance act like a large resistor creating thermal noise? Would this be a low noise way of implementing a large impedance? …
user1416658's user avatar