Bob wrote:
On Wed, 23 Jun 2004 18:33:54 +0000 (UTC), Paul Wylie
wrote:
Bob wrote:

Interesting.... I guess it's not like a Pentium chip, you can't have any
errors... I understand that CPUs wire out the defects, and have tons of
repeated circuits... Maybe someone needs to make a different style
sensor that can have faults that can be replaced.

I don't know where you're getting that information,


I'm not sure where I read it, and I don't know if it was specifically for
Pentium's, but I did read about CPU technology where the chip has redundant
sections and the ones that work are connected by the wiring machine attaching
the welded leads. It was no doubt from a magazine at work, we get some kind of
technology news. I'm on vacation so I can't go look for it!

I think this is all a red herring. With processors you can get away
with redundancy, backup circuits, etc, because it doesn't matter too
much *where* on the die the actual processing occurs. I can't see that
any of this discussion applies to a CCD however. If a pixel in the
middle of my image is defective, it doesn't help me too much by
switching to a redundant pixel on the outside of my sensor! In other
words, the position of the circuits in a CCD is critical, so you can't
use redundancy.