Alt-BEAM Archive
Message #00704
To: "'Terry Newton'" wtnewton@nc5.infi.net, beam@corp.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Sat, 20 Feb 1999 14:35:26 -0800
Subject: [alt-beam] Re: hmmm...i wonder which subject
content-type: text/plain
Hello Noam and associative memory fans,
I tried you circuit and found that it oscillates most of the time because
with the 3 gate configuration 1/2Vcc can appear at the input which puts the
inverter in the linear region. I believe that larger networks of 74HC14
gates may work. It requires 3 or 4 resistors at each input node to increase
the probability of switching and make the circuit "interesting". That means
4 or 5 (or more) gates.
I'm going to try this with 10 gates (9 resistors) to create a
"neighborhood" for the middle cell. If all goes well this could lead to
arrays of such 9 resistor cells with each cell connected to it's 9
surrounding neighbors which may be capable of generating "LIFE" or other
CA. These can be asynchronous with propagation determined by a cap (and
large series resistor) at each input. Or the cells can be synchronized by
adding a "tristate" gate (instead of the large series resistor) to each
input so that the cell will retain the last memory. Pulsing the tristate
inputs will cause a next generation for the whole array (at least that's the
theory).
Attached is a GIF of NOAM's circuit using a 4066 instead of the transistor
he described. All whip up the GIFs for the proposed 10 cell array later.
<>
enjoy
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> -----Original Message-----
> From: Terry Newton [SMTP:wtnewton@nc5.infi.net]
> Sent: Saturday, February 20, 1999 3:16 AM
> To: beam@corp.sgi.com
> Subject: Re: hmmm...i wonder which subject
>
snip
> Maybe even with a hardwired associative memory? Noam Rudnick's
> post was interesting, now I'm thinking about crossed inverters
> and stable states...
>
> Terry Newton
------------------------------------------------------------------------
eGroup home: http://www.eGroups.com/list/alt-beam
Free Web-based e-mail groups by eGroups.com
Attachment: noam1.gif
Home