On Mon, 18 Aug 2008 12:45:13 +0100, Invisible <voi### [at] devnull> wrote:

>OK, so does anybody know the difference between a TTL logic gate and a 
>CMOS logic gate?
>
>I mean, *obviously* they make 'em a different way. But I don't make 
>logic gates - I use them. Is there any difference visible to the end-user?

TTL is slower and uses more power.
I once built a clock out of TTL, in the mid 70's it used IIRC 50 amps at 5 Volts
Vcc. A couple of years later a CMOS clock ran from a PP3 battery
-- 

Regards
     Stephen

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