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- Newsgroups: alt.cyberpunk.tech
- Path: sparky!uunet!mcsun!sun4nl!dutrun!donau!hal.et.tudelft.nl!rene
- From: rene@hal.et.tudelft.nl (Rene Bodenstaff)
- Subject: Ok, listen to this then \ldots
- Message-ID: <1992Dec28.211101.28476@donau.et.tudelft.nl>
- Keywords: CMOS Neural Stimulating Array
- Sender: news@donau.et.tudelft.nl (UseNet News System)
- Nntp-Posting-Host: hal.et.tudelft.nl
- Organization: Delft University of Technology, Dept. of Electrical Engineering
- Date: Mon, 28 Dec 1992 21:11:01 GMT
- Lines: 39
-
- I was following one of those threads about 'mind taps' and other
- invasive surgery in order to link us up with our machines.
- I heard some guys say it would be nice to have and some other
- guys replied it would be impossible to construct etc. And nobody
- was really sure what was going on...
-
- And then I read this:
-
- A 16-Channel CMOS Neural Stimulating Array
-
- {\em Abstract) \-- This paper describes a probe designed for the
- highly selective long-term stimulation of neuronal assemblies in
- the central nervous system. The micromachined multishank probe
- incorporates CMOS circuitery to control the output current on
- 16 iridium oxide (IrO) electrode sites. Serial site addresses and
- current amplitude data are loaded into the probe at 4 MHz and converted
- to analog stimulus currents over a range of \pm 254 \mu A using 16 on
- chip 8-b DAC's. The probe circuitery dissipates only 80 \mu Watt from
- \pm 5 Volt supplies and uses five external leads. It permits the IrO
- sites to be activated by voltammetry from off-chip, provides per-channel
- pulse time-outs to prevent accidental overstimulation of the tissue,
- and signals the external world using a status bit, in the event of
- certain trouble condition. The stimulating site impedances and the
- stimulus current can be measured from off-chip on demand. The circuitery
- is implemented in a single-metal, single-poly, CMOS proces with 3-\mu m
- minimum features using 7100 transistors in an area of 11 mm^2.
-
- {from: IEEE Journal of Solid-State Circuits, vol.27, december 1992}
-
- There were micro-photo's of the probes: small dies with small points
- emerging from one side. This needles are 3 mm long, 135 \mu m in width and
- could be implanted in some nervous tissue, without causing to much
- damage...
-
- I looked for an ordering form, 'cause I want a thousand, but no luck.
- {How would a 64 Mb machine feel, core dumping right in your
- brain :-)}
-
- ---< Sonic says: "more haste is more speed" >---
-