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Closed-loop class E transcutaneous power and data link for MicroImplants

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2 Author(s)
Troyk, P.R. ; Pritzker Inst. of Med. Eng., Illinois Inst. of Technol., Chicago, IL, USA ; Schwan, M.A.K.

The use of a multifrequency transmitter coil driver based on the class E topology is described. The development of a high-Q approximation, which simplifies the design procedure is presented. A closed-loop controller to compensate for transmitter and receiver variations, and a method of data modulation using synchronous frequency shifting are described. The closed-loop class E circuit shows great promise, especially for circuits with unusually low coefficients of coupling. Currents of several amperes, at radio frequencies, can easily and efficiently be obtained.

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Biomedical Engineering, IEEE Transactions on  (Volume:39 ,  Issue: 6 )