gfgs pedo <[EMAIL PROTECTED]> wrote:
> why exactly is avalanvche break down a good RNG?
> Thank u.
Avalanche noise is just about as good as Johnson / Johnson-Nyquist /
thermal noise (all names for the same phenomenon) for collecting
entropy. The spectral density is flat, but the amplitude distribution
isn't Gaussian, so you should probably do a little hashing of the
output.
Avalanche noise has the advantage that its amplitude is greater than
thermal noise, which makes it easier to detect and build circuits
around. A 10 kOhm resistor produces thermal noise on the order of
10^{-8} V / sqrt(Hz). A diode in avalanche breakdown with .5mA of
current running through it produces on the order of 10^{-7} V /
sqrt(Hz).
For a description (not by me) of how to make an avalanche RNG, consult
http://www.jfet.org/hw-rng.html
A few reasonable introductions to noise in solid-state devices are:
"Intrinsic Noise in Electronic Systems"
http://web.mit.edu/6.121/www/Resources/handouts/int_noise.pdf
"Op Amps for Everyone"
Chapter 10: Op Amp Noise Theory and Applications
http://www-s.ti.com/sc/psheets/sloa082/sloa082.pdf
"Analog Integrated Circuit Design" by Johns and Martin
Chapter 4: Noise Analysis and Modeling
"Analysis and Design of Analog Integrated Circuits" by Gray and Meyer
Chapter 11: Noise in Integrated Circuits
"The Design of CMOS Radio-Frequency Integrated Circuits" by Thomas Lee
Chapter 10: Noise
"Electronic Circuits and Applications" by Senturia and Wedlock
Chapter 17: Noise
"The Art of Electronics" by Horowitz and Hill
Chapter 7: Precision Circuits and Low-Noise Techniques
Section 3: Amplifier Noise
Section 4: Noise Measurements and Noise Sources
--
Riad Wahby
[EMAIL PROTECTED]
MIT VI-2/A 2002
