Biomedical implant with high speed, low power two-way telemetry
February 18, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2850726 3727616 Rechargeable tissue stimulating system Detection plate for an identification system Movement detecting apparatus and method Telemetry means for tissue stimulator system Programmable human tissue stimulator Implantable calibration means and calibration method for an implantable body transducer Pacing generator programmer with transmission checking circuit Implant telemetry system InventorsAssigneeApplicationNo. 06/443446 filed on 11/22/1982US Classes:340/870.32, Mutual inductance340/870.19, Pulse607/32Communicating with pacer (e.g., telemetry)ExaminersPrimary: Caldwell, Sr., John W.Assistant: Heim, Michael F. Attorney, Agent or FirmInternational ClassesH04L 25/49 (20060101)A61N 1/372 (20060101) AbstractFor inbound data transmission a carrier signal is gated by the external programmer to transmit bursts of discrete numbers of cycles. The carrier is picked up by an implanted telemetry coil. The bursts are amplified and decoded by "missing pulse" detection. Outbound telemetry is synchronized with the external constant carrier in a similar manner by loading the coil for discrete numbers of cycles. In the preferred embodiment, within an eight cycle bit period, two cycles of 64 kHz carrier represent "0" while a six cycle burst represents "1", to achieve a two-way data transmission rate of 8000 bits per second.Other References
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