[107811] in Cypherpunks
Re: CDR: oscillators generating all freq = noise generator (fwd)
daemon@ATHENA.MIT.EDU (Steve Schear)
Sun Jan 24 19:04:14 1999
In-Reply-To: <199901242040.OAA00903@einstein.ssz.com>
Date: Sun, 24 Jan 1999 15:53:31 -0800
To: Jim Choate <ravage@EINSTEIN.ssz.com>
From: Steve Schear <schear@lvcm.com>
Cc: cypherpunks@cyberpass.net
Reply-To: Steve Schear <schear@lvcm.com>
>
>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any in my catalogs but they're about 3 years out of date.
Do a search on altavista under "analog VLSI" There's been a considerable
amount of research and some commercialization of this field. Synaptics was
an early entrant. They now use the technology to supply laptop touchpads
(e.g., Dell's Lattitude series.)
Many of the analog VLSI researchers have abandoned the troublesome linear
circuits for the more accurate, stable and energy efficient non-linear
variety.
--Steve
