Re: [SI-LIST] : Precision Clocking
D. C. Sessions ([email protected])
Mon, 06 Apr 1998 14:29:02 -0700
GEisler wrote:
>
> To designers interested in precision clocks:
>
> What level of precision is desirable/useful in clock distribution nets for
> boards and systems?
>
> Our current "clock spreader" chip provides 18 outputs, all within a 25
> picosecond band with very low jitter. This is the state of the art in the
> semiconductor tester world. Are there requirements for this level of timing
> precision in applications outside of ATE? We would very much like to hear
> thoughts and opinions on this subject.
You didn't say, but I trust that they're differential signals?
Otherwise the 25ps is irrelevant since SSO crosstalk will dwarf
it and threshold shift accounts for at least an order of magnitude
more.
--
D. C. Sessions
[email protected]