Hi Tobias:

When integrated circuits first came out I got the free three ring binders from
Fairchild and built some Johnson & binary counter circuits using the 3.3 Volt
Resistor Transistor Logic (RTL) ICs. http://www.prc68.com/I/comp.shtml#Lamp

Later TTL came out then CMOS.  It turns out that CMOS has power consumption
that's directly proportional to clock speed, so when you clock CMOS faster it
draws more power.  An advantage of CMOS is that the size of a bit cell is small
but  you pay a very high price in power consumption for high speeds.  At DC it
has very low power consupmtion.

By contrast the power consumption of RTL only has a small relationship to clock
speed.

I wonder how other logic families compare in terms of power drawn at high
speeds?   Maybe using some other logic family would allow similar speeds but
consuming much less power.  Probably at the expense of larger (more expensive)
chips, but for power sensitive applications that may desirable.

-- 
Have Fun,

Brooke Clarke
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