RE: Motorola 33794 electric field imaging IC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Marco.Denicolai-at-tellabs-dot-com>

Hi Jim,

It seems to me (after a quick reading) that the device measures its own
generated E-field distortions and, from that, infers object
distance/position. I guess it performs some rudimenal vector algebric
inside

What would be more interesting, IMHO, would be to find a good
application note about this device or the technical principle of
measurement described somewhere.

We could then develop our own, ruggeded and properly shaped "whatever"
to picture the E-field around a TC.

Best Regards

 > -----Original Message-----
 > From: tesla-at-pupman-dot-com [mailto:tesla-at-pupman-dot-com]
 > Sent: 11. maaliskuuta 2003 03:24
 > To: tesla-at-pupman-dot-com
 > Subject: Motorola 33794 electric field imaging IC
 >
 >
 > Original poster: "Jim Lux by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>
 >
 > Anybody fooled with the MC33794.. it's a thing used to image electric
 > fields, typically for air bag controllers, etc.
 >
 > It "generates a high purity sinewave, steers it to one of 9 external
 > electrodes and measures the resutlant field coupled into the
 > non-driven
 > electrodes"
 >
 > http://e-www.motorola-dot-com/webapp/sps/site/prod_summary.jsp?cod
 > e=MC33794&nodeId=0143597973b9G0
 >
 > The evm (KIT33794DHEVM) works at 125 kHz (of all frequencies to
 > choose!)  $138 from future-active-dot-com
 >
 > Here's the data sheet for the part:
 >   http://e-www.motorola-dot-com/brdata/PDFDB/docs/MC33794.pdf
 >
 > The part is $3 in Qty:1000+
 >
 >
 >
 >

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