Alt-BEAM Archive
Message #02236
To: beam@corp.sgi.com
From: Wouter Brok w.j.m.brok@stud.tue.nl
Date: Mon, 12 Apr 1999 08:53:59 +0200
Subject: [alt-beam] Re: Linked BiCores; How Does The Slave Cycle?
Hello Wilf,
Thank you, I will have a good look at them.
I didn't know how to figure out to which voltage (above +V) the peak is
peaking, which was one of my problems describing it. My second problem was
this: the graph of the 74HC04 shows that the asymptote is converging to 2,5
Volts. This is what I calculated (assuming that the 'threshold' was at 2,5
V or +V/2, which probably isn't the case, but it made it very nicely
symmetric); but if it truely does converge to +V/2 it will never reach it
in theory. In practice there is always the noise of course, but .... well
I don't know.
Yesterday evening I started to write a bit already, but the thing that
always keeps me up the most are the graphics; I don't have a scanner (have
to do that at the hospita of my grilfriend) and a digitizing oscilloscope I
need to find at uni. My oscilloscope (one with lamps (is that how you call
them in english?) which takes a couple op minutes to warm up) doesn't
trigger very well, so I don't see the interesting details of the signal.
I agree with you: the suspended bicore started fascinating me from the
first moment I saw it and the two motor walker I build with it could do
things I didn't see yet with a microcore walker.
Which program does generate these pretty pictures?
Which points did you think I missed?
regards
Wouter Brok
>As a little appetizer I have attached four BiCores with the relevant
>waveforms. These circuits look simple but they continue to surprise me in
>the way that subtle factors can greatly influence their operation. They are
>true BEAM circuits: simple in design and complex in behaviour! Have another
>look at these circuits before you write your article (because I think you
>missed a few points in your earlier description).
>
>best regards
>
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
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