[time-nuts] Simple AC mains zero-cross detector

Charles Steinmetz csteinmetz at yandex.com
Tue Dec 16 23:03:53 EST 2014

Bob wrote:

>The Collins paper on hard limiters does indeed apply here. You 
>*could* make a 60 Hz chain that got down into << 1 us sort of resolution.

I don't know how "much less than" 1uS you mean by "<<", but I was 
seeing less than 1uS jitter with the circuit described.

Best regards,


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