System monitoring reprogrammable implantable transponder

Details System monitoring reprogrammable implantable transponder System monitoring reprogrammable implantable transponder

1994-10-13

1998-03-03

Hofsass, Jeffery

Communications: electrical

Continuously variable indicating

Condition responsive

34087018, 34087031, 34082554, 455 383, G08C 1912

Patent

active

057240302

ABSTRACT:
A passive transponder including an antenna for receiving an input signal and transmitting an output and a memory for storing the data received by the transponder from an interrogator. The transponder can operate in either a read mode or a programming mode. The transponder includes an integrity circuit for indicating the integrity of the input signal, a monitoring circuit that monitors a characteristic of a host and an impedance modulator that prevents the overmodulation of the output signal.

REFERENCES:
patent: 5073781 (1991-12-01), Stickelbrocks
patent: 5231273 (1993-07-01), Caswell et al.
patent: 5252962 (1993-10-01), Urbas et al.
patent: 5345231 (1994-09-01), Koo et al.

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