Implantable receiver circuit

Details Implantable receiver circuit Implantable receiver circuit

1976-04-29

1977-08-30

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

040447758

ABSTRACT:
In an implantable receiver circuit there is provided a tuned filter responsive to externally provided radio frequency energy bursts. The receiver also includes a pair of oppositely poled diodes for respectively providing positive and negative rectified versions of the energy bursts. The cathode of one diode is coupled through a low-pass filter circuit to an output capacitor and the anode of the other diode is coupled through a low-pass filter to the control electrode of a semiconductor switching device, the main electrodes of which are coupled between the output capacitor and the point of reference potential. With this connection the switching device is rendered conductive during the time no energy burst signals are applied to the tuned circuit thereby allowing the output capacitor to discharge during this time. During the time an energy burst is provided, the second rectifier circuit maintains the switching device non-conductive.

REFERENCES:
patent: 3204637 (1965-09-01), Frank et al.
patent: 3662758 (1972-05-01), Glover
patent: 3667477 (1972-06-01), Susset et al.
patent: 3893463 (1975-07-01), Williams

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