[time-nuts] No State Of The Art Counter

Geraldo Lino de Campos geraldo at decampos.net
Mon Jan 10 02:26:30 UTC 2011


Take a look in Analog Devices ADCMP572/573. Very fast comparators,
easy to add DC offset and hysteresis.

>How will the input side work? How will you handle input signals of
>various kinds? In particular sine of various amplitudes and frequencies.
>Slew-rate can be a limiting factor as white noise will convert into
>jitter if hitting a straight comparator. Choice of trigger point can be
>done to achieve lowest jitter, so just AC-blocking and trigger on the 0V
>may not be the best solution if shape is not well known. Noise of input
>stage comes into play.



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Geraldo Lino de Campos
geraldo at decampos.net


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