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From: Toaster <toaster@dne3.net>
Newsgroups: sci.electronics.design
Subject: Re: 50 ohm termination
Date: Tue, 18 Mar 2025 18:29:42 -0400
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On Mon, 17 Mar 2025 19:17:13 -0700
john larkin <jlArbor.com> wrote:

> On Mon, 17 Mar 2025 19:50:17 -0400, Toaster <toaster@dne3.net> wrote:
> 
> >Thank you for the advice. In my case I have a 10Mhz signal with very
> >sharp transitions (500ps, 5V) and wanted to make sure I did things
> >properly.
> 
> Interesting. What's generating the 5v signal? Lots of AC and Tiny
> Logic chips are that fast, but might strain to drive 50 ohms. We use
> several tiny triple buffers in parallel sometimes.
> 
> Regular thick-film surface-mount resistors are fine as terminators at
> 500 ps.
> 
> LVDS line receivers are great at the receive end.
> 
> 

I used a THS3111CD. Split up my project into a timing and driver board,
so i have some 50 ohm BNC cables between and wanted to be extra safe
about reflections at these higher frequencies.