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[DPRG] Families

Subject: [DPRG] Families
From: Mike McCarty jmccarty at ssd.usa.alcatel.com
Date: Thu Jun 28 10:59:52 CDT 2001

On Thu, 28 Jun 2001, Kipton Moravec wrote:

> I think those are switching speeds of discrete parts.  There are all sorts
> of things that can be done to help out the speed.
> 
> 1. More power (this is why processors have to have heat sinks.)
> 2. Lower the voltage range the switch switches.  If you can switch at say
> 1000
>     V/microsecond, it is faster to switch from 0 to 2V than it is from 0 to
> 5V.
> 3. Put the parts closer together. Light travels around 13 inches per
> nanosecond
>     (in a vacuum) if I did my math right.  It is slower on silicon.
> 
> I am sure there are other things but I can't think of them at the moment.

Use smaller parts so there is less junction capacitance to charge/discharge.

Use substrates which have greater carrier mobility.

Mike
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