Implant communication system with frequency shift means

Details Implant communication system with frequency shift means Implant communication system with frequency shift means

1984-01-03

1985-08-06

Kamm, William E.

Surgery

Truss

Pad

128419PT, 34087031, A61N 108

Patent

active

045329320

ABSTRACT:
An implant communication system is disclosed for use with an enclosure having a tuned coil mounted therein that is implanted in a patient. A low impedance shunt circuit is connected across the tuned coil, with the impedance of the shunt circuit being modulated in accordance with a data signal. The tuned coil reradiates the phase and amplitude of an externally generated magnetic carrier signal at a selected frequency. A second shunt circuit is connected across the tuned coil for changing its tuning, to enable the tuned frequency to correspond to the selected frequency.

REFERENCES:
patent: 2823862 (1958-02-01), Moore, Jr.
patent: 3255588 (1966-05-01), Vuilleumier et al.
patent: 4223679 (1980-09-01), Schulman et al.
patent: 4281664 (1981-08-01), Duggan
patent: 4361153 (1982-11-01), Slocum et al.
patent: 4416283 (1983-11-01), Slocum

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