[Gb-ccb] Caltech Backend Telecon Monday 07 July 4pm EDT

[Richard Lacasse]

All,

Martin Shepherd wrote:

> 
>>Seems quite attractive for noise abatement on the
>>digital signals.  If I recall the earlier meeting, we decided that the
>>optos were an unnecessary feature.  Maybe we should do it, since it is
>>pretty cheap and a definite win.
> 
> 
> That would be fine with me. However, assuming that by opto-isolation,
> we are talking about optic fibres, rather than opto-isolator chips and
> wires, the feasibility of this would presumably hinge on the
> availability of fibre-connectors with a metal screen going right up to
> the borders of the fibre. I'll see what I can find.
> 

All I had in mind were wires and opto-isolator chips.  A differential driver 
would drive a shielded twisted pair and at the far end there would be a 
termination network and opto-isolator chip.  No current has to flow through the 
grounds or power supplies of the end with the opto-isolator chip, so shield 
currents are minimal.

Rich