Chris,
The simplest zero crossing detector would be to feed your 1 volt, 10 mHz
from the XL-DC into the input of an IC with schmidt trigger inputs. You
would need to provide a series coupling cap and probably some DC bias from a
pot to adjust symmetry of the output. I would also think that if you ran the
four or six inverters of a schmidt trigger inverter chip in series that you
would get a pretty good square wave out the end.
I have an XL-DC with four 10 mHz sine outputs but have not had the need
yet for a square wave. For that matter, it may be posible to find a 10 mHz
square wave somewhere inside the box before it is converted to a sine wave
that could be used for your application.
Al
Subject: [time-nuts] Zero-Crossing Detector Design?
Can anyone suggest a good reference design for a zero-crossing detector? I
am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin
from my XL-DC... And now I'm thinking that I should just home the uC clock
to it, as well.
Essentially, I believe that I'm looking for an efficient, stable, and
accurate sine-to-square converter... and I'll welcome any advice in this
area.
This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like
rectifying the signal, to be honest. I want to try to keep a smaller BOM,
sense the waveform primarily, and crunch numbers inside the uC.
-CH
Chris Hoffman
cq.k...@gmail.com
http://ar.ctur.us
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
