Troyk P R, Schwan M A
Pritzker Institute of Medical Engineering, Illinois Institute of Technology, Chicago 60616.
IEEE Trans Biomed Eng. 1992 Jun;39(6):589-99. doi: 10.1109/10.141197.
Magnetic transcutaneous coupling is frequently used for power and data transfer to implanted electronic devices. The proposed development of MicroImplants, small enough to be injected through a hypodermic needle suggest the need for a high-efficiency magnetic transcutaneous link. This paper describes the use of a multifrequency transmitter coil driver based upon the Class E topology. 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.
磁经皮耦合常用于向植入式电子设备进行能量和数据传输。拟开发的微型植入物小到足以通过皮下注射针进行注射，这表明需要一种高效的磁经皮链路。本文描述了一种基于E类拓扑的多频发射线圈驱动器的应用。提出了一种简化设计过程的“高Q近似”方法。描述了一种用于补偿发射器和接收器变化的闭环控制器以及一种使用同步频移的数据调制方法。闭环E类电路显示出巨大的潜力，特别是对于耦合系数异常低的电路。在射频下，几安培的电流能够轻松且高效地获得。
