[time-nuts] minimalist sine to square

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Jan 20 14:21:03 EST 2018

In message <eb956eca-4534-0463-031b-232f8bdbd62f at earthlink.net>, jimlux writes:

>> I played with that, I used a small transformer to balance the signal
>> and then into LVDS receiver through a voltage divider.  Worked well,
>> but I didn't measure the jitter, it was just for a micro-controller.
>You can also do it with capacitive dc block to one side, and some 
>resistors - the ap notes describe it.  The receivers are a fairly high Z 
>input, so you pick the voltage divider resistors to make the termination 
>resistance right for the incoming signal.

Yes, but that doesn't give you galvanic isolation, which I think is almost
mandatory unless it is a metrology situation.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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