[SI-LIST] Re: LVPECL to 1.8V HSTL Conversion
- From: "Ingraham, Andrew" <Andrew.Ingraham@xxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 28 Oct 2002 10:24:41 -0500
>In one of the app notes I saw a LVPECL to 1.8V HSTL Conversion as
detailed
>below,
...
>Does this conversion have any disadvantages. Should we take care of
>anything.
The (P) side sees a 25 ohm load, but the (N) side load is 50 ohms.
Because it is AC coupled, signals with asymmetry (such as long runs of
0's or of 1's) would skew the DC operating point, and introduce a rise
vs. fall delay skew.
Regards,
Andy
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