Re: Four Logic Levels

On Wed, 30 Apr 2008 07:40:36 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote:

On Wed, 30 Apr 2008 07:19:10 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Wed, 30 Apr 2008 07:09:18 -0700 (PDT), Robotnik
<fathahrahman@xxxxxxxxx> wrote:

Hey guys,
I was thinking of a new concept whereby we could
square the amount of information stored in a bit. Currently, the
information stored in a bit is whether the bit is on or off. To put it
simply, the information has a base (remember, logarithmic base) of 2.
If we could develop a mechanism whereby the base can be increased to 3
or 4, the amount of information stored can increased to more than
1.584 times in the case where the base is increased to two or 2
(twice ) if the base is increased to 4.
This can be accomplished by sensitizing 3(4 if
possible) voltage levels instead of the two currently. Your comments
are invited.


http://www.siliconfareast.com/flash-memory.htm

http://web.cecs.pdx.edu/~mperkows/ISMVL/flash.html

John


I do it all the time, but not at speed... I use it to set options on a
chip:

Option 1, pin grounded
Option 2, pin floating
Option 3, pin tied to VDD

...Jim Thompson

What circuitry is required to turn that single input into 2 bits at
CMOS levels? Do you use high value resistors to set the floating
level or some arrangement of transistors?

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
.

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