Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-09-12
1999-12-07
Jastrzab, Jeffrey R.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 60, A61N 100
Patent
active
059998482
ABSTRACT:
An implantable sensor/stimulator is connectable to a controller using just two conductors, which two conductors carry both operating power and data (data commands and/or measured data) between the sensor/stimulator and control circuit. Each sensor/stimulator may be serially connected to another sensor/stimulator, again using only two conductors, thereby allowing a "daisy chain" of such sensors/stimulators to be formed. Each sensor/stimulator in the daisy chain is individually addressable by the control circuit. Input data is sent to the sensors over the two conductors using a phase-modulated biphasic modulation scheme, which scheme also provides operating power for each sensor/stimulator connected to the two conductors. Output data is sent from the sensors to the controller over the same two conductors using a pulse-position presence/absence modulation scheme. The data transmission schemes provide a very high signal-to-noise ratio. Each sensor/stimulator includes a power rectifier circuit, a line interface circuit, a state machine controller, at least one sensor that generates an analog output current as a function of a sensed parameter, a low power current-to-frequency converter circuit, and a counter circuit.
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Gord John C.
Schulman Joseph H.
Alfred E. Mann Foundation
Jastrzab Jeffrey R.
Seidman Abraham N.
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