Re: Rewriting SSA. Is This A Chance For GNU/Linux?

On 06/04/2025 10:05, Richard Kettlewell wrote:

The Natural Philosopher <tnp@invalid.invalid> writes:

On 05/04/2025 22:57, Richard Kettlewell wrote:

The Natural Philosopher <tnp@invalid.invalid> writes:

   Analogue multiplication is the holy grail and can be dome using the
   exponential characteristics of bipolar transistors
>
https://www.analog.com/media/en/technical-documentation/data-sheets/ADL5391.pdf

The electronics there is far beyond me but how general (and how
reliable) can this be made?
>

Well it isn't very general. It takes two voltages between on and one
an multiplies them together.
That's what it does.
>
Going from digits to volts is relatively fast and easy, but the
reverse is not so true

 Right, probably not a fit for my application, then.
 

The operations I’m currently interested in are modular multiplication,
addition and subtraction with comparatively small moduli (12-bit and
23-bit, currently). It’s a well-undertood problem with digital
computation, of course, but I’m curious about whether there’s another
option here.

>
That flew over my head Richard. Advanced maths is not my forte ...

 You do modular arithmetic whenever you do times and dates - informally,
it’s the same thing as they way minutes and seconds wrap around from 59
to 0, hours from 23 to 0, etc.
 Putting it together into something useful is a bit more than that,
though, indeed, and a persistent concern is how to do it faster, hence
keeping an eye out for additional technology options.
 

Ah OK then. No. That is very 'integer' based stuff.
Analogue computing  works to model real world analogue systems
It's amazing how much code you have to write to simulate e.g. an audio tone control...because digital signal processing works in the time domain, but analogue works in the frequency domain. One resistor and one capacitor do more than a bunch of floating point computation...
--
     “I know that most men, including those at ease with problems of the greatest complexity, can seldom accept even the simplest and most obvious truth if it be such as would oblige them to admit the falsity of conclusions which they have delighted in explaining to colleagues, which they have proudly taught to others, and which they have woven, thread by thread, into the fabric of their lives.”
     ― Leo Tolstoy