[time-nuts] sine to square wave circuits - performance data?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Oct 3 23:02:35 UTC 2017


I have measured the PN of the LTC6957-4 at 10MHz.

I could measure the PN of the TAPR variant of the Wenzel circuit as well as the PN of the comparator based circuit (with CMOS output buffer).  


>     On 04 October 2017 at 11:38 Attila Kinali <attila at kinali.ch> wrote:
>     Moin,
>     The last couple of days, I have been looking into sine to square
>     wave converters. There are a few proposed circuits[1-4] and there
>     is of course Collins' paper [5]. But I am unable to find actual
>     performance data of the different circuits. Does someone have
>     such data and would share it with me/us?
>     Attila Kinali
>     [1] http://www.wenzel.com/documents/waveform.html
>     [2] http://www.ko4bb.com/~bruce/ZeroCrossingDetectors.html
>     [3] http://www.ko4bb.com/~bruce/CLKSHPR.html
>     [4] https://www.tapr.org/kits_t2-mini.html
>     [5] "The Design of Low Jitter Hard Limiters", by Collins 1996
>     http://ieeexplore.ieee.org/document/494304/
>     --
>     You know, the very powerful and the very stupid have one thing in common.
>     They don't alters their views to fit the facts, they alter the facts to
>     fit the views, which can be uncomfortable if you happen to be one of the
>     facts that needs altering. -- The Doctor
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