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Advice on Noise in Square Input Signal

I am reading the following signal from an open drain output, and trying to read the signal frequency. However, I am getting short spikes in the wave as seen below, and this is messing with the reading ...
Mateo Segura's user avatar
1 vote
3 answers
182 views

Do parallel LNAs at 90-degrees to eachother reduce the noise floor more than side-by-side?

Wiring amplifiers in parallel in a summing configuration improves the signal to noise ratio because amplifier noise in each LNA is uncorrulated. However, external noise sources will still be a factor ...
KJ7LNW's user avatar
  • 2,200
6 votes
5 answers
2k views

Detection of signals buried in noise

This is more of a general question to see which methods are the most common to improve the detection of a signal which is buried in noise. Currently, we are building an optical system for medical ...
James's user avatar
  • 113
6 votes
2 answers
6k views

False Positives on Arduino Input

I've used analog and digital input for a multitude of applications with the Arduino Uno board. It has continuously given extremely non reliable readings, where the analog input is always fluctuating, ...
Mark Y.'s user avatar
  • 119