2 Aug
2004
2 Aug
'04
4:40 a.m.
From: "William Donzelli"
<aw288(a)osfn.org>
Hi
It has been shown that if you loosely couple three oscillators
they will produce chaotic periods. I've also seen that when
a zener diode is around 7.2V it is especially noisy. This
has been used to produce many types of random noise, including
white and pink noise for special purposes. Most silicon transistors
will zener in this region if back biased, base to emitter. I
ones made a wave sound simulator using both the zener and
the oscillator principles.
Dwight
My favorite on the opposite end, is a random bit
stream produced by
using the pulses from a geiger counter (and associated radioactive
material) to clock a long shift register. It's well-discussed, but I'm
not sure anyone ever produced one.
I *think* some military crypto gear did things link this, but I am not
sure.
I know that AT&T once marketted a true random bitstream chip using a bunch
of unstable oscillators.
William Donzelli
aw288(a)osfn.org