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From: mgaylord@nike.calpoly.edu (HP48SX Free software)
Newsgroups: comp.sys.handhelds
Subject: RE: 28 power Study
Message-ID: <9012041733.AA612104@nike.calpoly.edu>
Date: 4 Dec 90 17:33:55 GMT
Lines: 23
To: handhelds@gac.edu
Return-path: <mgaylord@nike.calpoly.edu>
To: handhelds@gac.edu

Hello,

Maybe my two cents will help clarify things.

I believe the capacitors Bob Peraino was talking about are the parasitic
capacitors in the CMOS circuits. ( the bane of EE's unless you are building
dynamic memories)

Yes CMOS does use more power at higher speeds, but we are concerned with
energy which is a function of power AND time.  A battey can only supply
so much energy. You can draw a lot of power for a short period of time
or draw less power for a longer period of time, but you get 
the same amount of energy.

I think Bob's point was that the overhead power loss is the same whether 
you are crusing at warp speed or at a snails pace, and that the energy
used ( excluding overhead ) to run a program is the same reguardless
of the speed.  The longer
you are using overhead the worse off you are inreguard to battery life.

Happy in 48 land,
Malcolm
mgaylord@eros.calpoly.edu