On 16/01/2011 11:47, The Natural Philosopher wrote:

all analogue of course.

All computers are in fact analogue, only the DATA is held in digital
format.

Never the SIGNALS.

Hmm, that's a rather unorthodox view. It amounts to saying that there's
no such thing as a digital signal. That flies in the face of
established usage, and the IEV which gives the following definitions for
"signal" and "digital signal":

Signal:
- physical quantity, one or more parameters of which carry information
about one or more quantities
NOTE €“ These parameters are referred to as €œinformation parameters€�.

[IEV number 351-21-51]


Digital signal:
- signal whose information parameter may assume one out of a set of
discrete values.

[IEV number 351-21-54]

--
Andy