Alt-BEAM Archive

Message #02150



To: "'Wouter Brok'" w.j.m.brok@stud.tue.nl, beam@corp.sgi.com
From: Charles Monica CMonica@drte.com
Date: Fri, 9 Apr 1999 09:48:40 -0400
Subject: [alt-beam] Re: Linked BiCores; How Does The Slave Cycle?


Wouter;

Thanks very much for taking time to reply to my not so simple question.
Can you point me to a source of Tildens paper you mentioned?

I must admit I am still unclear how the slave cycles, but I will think about
your email over the weekend and hopefully come to understand this circuit. I
always had trouble understanding analog circuits (I'm a digital guy at
heart).


Thanks,
Charlie.



>By the way: have you read the article by Susanne Still and Mark
Tilden,
Coupled oscillators and walking control .... I believe?

>now both ends of the
>RC are low, and both ends of the other slave RC are at high. What
am I
>missing? Does the RC charge/discharge of the slave occur at the
time the
>masters output changes state?
mmmm, I find it very hard to explain this; I hope you get it a bit;
For the slave-capacitor to charge there needs to flow a current
through the
linking-transistors, right? Well, if that current can flow depends
on the
voltage on the master-side of the linking-resistors.
Maybe you should do this: draw one nv-neuron (in a microcore for
example;
but just have a look at that one neuron). Normally you will draw an
input,
an output and the resistor to ground at one side. I guess you
understand
how this work. Assume the resistor isn't connected to ground but to
something that's either Gnd or +V. Try to imagine what happens if
the whole
thing is oscillating, but when the pulse (or process, or whatever
you want
to call it) is 'in' the neuron you are looking at that one side of
your
resistor goes from gnd to +V and back to gnd. Imagine what happens
then.
Maybe that gives you some understanding.







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