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1answer
320 views

How to account for input noise on a zero crossing detector op amp?

To save potential confusion let me start by saying I just started learning opamp theory about a week ago. I'm currently familiar with inverting, non-inverting, summer, and difference opamps. My (...
1
vote
1answer
79 views

A problem regarding connecting the grounds within two seperate circuits

Figure 1 I am trying to design the above circuit for my project to create zero crossing detector as shown in the above figure. This configuration was proposed originally by the member named "...
0
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1answer
316 views

Automotive alternator: zero crossing detection (frequency)

I need to detect voltage frequency of an automotive alternator (before rectification). Alternator is a 3-phase generator, I will be looking at one of the phases. The voltage frequency never exceeds 1....