Surgery – Truss – Pad
Patent
1979-02-28
1980-09-23
Kamm, William E.
Surgery
Truss
Pad
A61N 136
Patent
active
042236797
ABSTRACT:
A telemetry system for use in a living tissue stimulator system in which an externally located oscillator is controlled by impedance changes in an impedance reflecting circuit located in an implantable tissue stimulator. In a first embodiment the impedance reflecting circuit is an LC circuit thereby frequency modulating the externally located oscillator and in a second embodiment it is an LR circuit thereby amplitude modulating the externally located oscillator. More specifically, the externally located oscillator drives an LC circuit in which the inductor is positioned in magnetically coupled relationship to an inductor in the impedance reflecting circuit. The externally located oscillator is chosen so that its frequency and amplitude is partially determined by the impedance of the LC circuit and the magnetically coupled impedance reflecting circuit. A parameter or signal to be telemetered, which could be in the form of a digital or an analog signal, is used to modulate an output frequency of a voltage controlled oscillator located in the implantable tissue stimulator. This frequency modulated output of the voltage controlled oscillator drives an FET switch which alters the impedance of the impedance reflecting circuit, thereby modulating the output of the externally located oscillator. Thus, a telemetry system is provided in which minimum power is required from the implantable tissue stimulator.
REFERENCES:
patent: 3135264 (1964-06-01), Tischler et al.
patent: 3195540 (1965-07-01), Waller
patent: 3777762 (1973-12-01), Nielsen
patent: 3830242 (1974-08-01), Greatbatch
patent: 3942535 (1976-03-01), Schulman
patent: 4026305 (1977-05-01), Brownlee et al.
patent: 4142533 (1979-03-01), Brownlee et al.
Beane Russell R.
Mann Brian M.
Schulman Joseph H.
Kamm William E.
Pacesetter Systems Inc.
LandOfFree
Telemetry means for tissue stimulator system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telemetry means for tissue stimulator system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telemetry means for tissue stimulator system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-640348