[107804] in Cypherpunks
CDR: oscillators generating all freq = noise generator (fwd)
daemon@ATHENA.MIT.EDU (Jim Choate)
Sun Jan 24 15:56:42 1999
From: Jim Choate <ravage@EINSTEIN.ssz.com>
To: cypherpunks@EINSTEIN.ssz.com
Date: Sun, 24 Jan 1999 14:40:56 -0600 (CST)
Reply-To: Jim Choate <ravage@EINSTEIN.ssz.com>
----- Forwarded message from Anonymous -----
Date: Sun, 24 Jan 1999 19:15:31 +0100
From: Anonymous <nobody@replay.com>
Subject: CDR: oscillators generating all freq = noise generator
At 08:27 PM 1/23/99 -0600, Jim Choate wrote:
>One possible way to build it is via oscillators that generate all unit
>frequences from 2 to n-1. The run them through a some sort of tuned circuit
>that is tuned to n. Any signals that get through would be sub-harmonics of
n.
>This would demonstrate that n isn't prime. This might be done opticaly
>somehow.
This resembles the way RF people can use noise generators to measure
their equiptment. See, e.g., the Unusual Diode faq.
----- End of forwarded message from Anonymous -----
That was the inspiration. Though I suspect that getting a sufficiently high
Q in an analog tank circuit is wishful thinking. It might be possible to use
a gyrator-capacitor combination. That would be scalable to IC's. Build a
gate array of thousands of tunable filters with some sort of cross-point
switch. Does anyone make FPGA equivalents of analog components? I can't find
any in my catalogs but they're about 3 years out of date.
I was looking at the comparison of the line segments and I realized that the
geometry is 1-to-1 with frequency. Meaning that it should be relatively easy
to build circuits. Then I got to thinking about optical techniques but I'm
not familiar with any that are equivalent. I was thinking some sort of
optical tuned ciruit that would oscillate or create a standing wave if the
signal held a component that was a n multiple or sub-harmonic.
I was also thinking of looking into digital filters.
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