Wide band inductive transdermal power and data link
Patent 4679560 Issued on July 14, 1987. Estimated Expiration Date: 
April 2, 2005. 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.
April 2, 2005. 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 3195540 3796221 Transcutaneous signal transmission system and methods Patent #: 4441210 InventorAssigneeApplicationNo. 06/719232 filed on 04/02/1985US Classes:607/60, Telemetry or communications circuits128/903RADIO TELEMETRYExaminersPrimary: Kamm, William E.Attorney, Agent or FirmInternational ClassA61N 1/372 (20060101)AbstractThe present invention utilizes a pair of coils, one beneath the skin and one outside the skin, each connected to a capacitor. The values of the capacitor and coil inductance are selected to provide a stagger-tuned link. That is, the values of the components are selected to place the pole of one filter above the operating frequency, and the pole of the other filter below the operating frequency of the link. The poles will move as the coupling coefficient changes, desensitizing the link to the coupling so that the coils can be misaligned in any manner with little effect on the output.A fully active driver or class D amplifier is preferably utilized to effectively drive the link with a square wave signal. This signal can be modulated to convey data information to the implanted receiver coil beneath the skin.Field of SearchRADIO TELEMETRY | |
