Den 29. aug. 2006 kl. 18.56 skrev John Francis: > On Tue, Aug 29, 2006 at 09:24:20AM +0200, Jostein ?ksne wrote: >> AFAIK, many of the MedF digitals achieve larger sensors by combining >> more than one CCD. When doubling the area of a sensor means a tenfold >> increase in cost it makes me wonder what kind of potential there may >> be for cost reduction in the surrounding circuitry. > > None, to all intents and purposes. > If you look at the amount of support circuitry on a sensor > (other than the per-pixel stuff, which needs to be there > no matter hom many individual pieces the sensor is made of) > there's hardly any - a few latches, and the A-to-D logic. > Having, one, two, or four copies of those circuits is at > most going to add a few pennies to the total cost.
No. It is much easier to produce two small and sufficiently perfect silicon crystals than one at the size of the two. On the other hand the problem with combining two sensors is the production of circuitry close to the sensor edges or the advanced optics if they are spaced apart. DagT http://dag.foto.no Beware of internet links. You never know what is on the other side. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
