[SI-LIST] Re: Ghz/Gbs convert
- From: "Doug McKean" <dmckean@xxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Thu, 20 Jun 2002 15:35:19 -0700
Not a silly question. Idealize the bit stream to the
a stream of alternating ones and zeros or a perfect
square wave constructed from ones and zeros.
The period of such a bit stream would start with the
start of the ones bit and end with the end of the
adjacent zero bit. Since such a period is composed
of two bit positions, the conversion is GHz = Gbs/2.
Example ...
2 Gbs (digital) = 1 Ghz (analog)
BUT, keep in mind this would roughly equate to the
fundemental of such a bit stream. In order for the
circuit to carry such a square wave reeasonably well,
it must be able to handle something like the 5th or 7th
harmonic of that fundemenal. So a circuit that's carrying
a 2 Gbs data stream *might* have to be constructed
such that it can carry a 7 GHz analog signal.
Regards, Doug McKean
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