Re: Four Logic Levels
- From: Jim Thompson <To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx>
- Date: Wed, 30 Apr 2008 08:45:54 -0700
On Wed, 30 Apr 2008 11:30:22 -0400, Spehro Pefhany
<speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
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?
Inverters sized for thresholds at 1/4 and 3/4 of VDD is one way.
Do you use high value resistors to set the floating
level or some arrangement of transistors?
High-value resistors typically (typical 1K/sq available on analog
processes).
Best regards,
Spehro Pefhany
...Jim Thompson
--
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- From: Robotnik
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- From: John Larkin
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