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KEYWORDS; BIOTELEMETRY ELECTROPHYSIOLOGY SENSORS 
MICRO-CIRCUITRY

ABSTRACT; Biopotential recordings of human psycho-
physiological parameters are hampered in many field settings,
and some laboratory and clinic settings, by the sensor
technology.

[Eleanor White's comment:  Take SPECIAL NOTE of that
word "PSYCHO-"... that has great significance for neuro-
electromagnetic experimentees!]

Conventional electrodes which tether the subject to the
signal amplification and recording equipment, are cumbersome
to apply, often interfere with normal movements, are easily
dislodged, and induce electrical noise due to the movement of
the electrode wires carrying low level signals.

This project seeks to design essentially wireless electrode
recording systems that use radio frequency telemetry to
transmit the biopotential signal from the recording site to a
body-worn transceiver and then to a remotely located
receiver.

[Eleanor White's comment:  That means, radio signals
THROUGH THE FLESH to an externally worn transceiver.  The
only difference between this UNclassified project and the
involuntary neuro-electromagnetic experimentees is distance,
which can be overcome with time.]

The present subcontractor has developed transceiver and
receiver technology that will be reviewed and customized as
needed for the present application. The focus here will be on
developimg a generic design for the sensor subsystem
("telectrodes") to include the transducer interface with the
skin, miniaturized amplifier and filter circuitry, an optimal
connection between the transducers providing differential
inputs to the amplifier, a longlasting but compact battery,
and transmitter.

Phase I will consist of a design specification, development
of a bench-top engineering prototype, design trade-off
studies using the prototype, and the delineation of a detail
design.

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