Towards a Closed-Loop Transmitter System with Integrated Class-D Amplifier for Coupling-Insensitive Powering of Implants

被引：0
|
作者：
Valente, Virgilio [1 ]
Eder, Clemens [1 ]
Demosthenous, Andreas [1 ]
Donaldson, Nick [2 ]
机构：
[1] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England
[2] UCL, Dept Med Phys, London WC1E 6BT, England
来源：
2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS) | 2012年
关键词：
COILS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The efficiency of an inductive power transfer link is greatly affected by misalignment between the coils, caused by the patient's movement, after implantation. In this paper we present the preliminary design of a coupling-insensitive system with an integrated class-D transmitter, suitable for powering epidural stimulation implants. The operation of the system is based on closed-loop modulation of the power delivered to the implant, to compensate for losses of coupling between coils after implantation. An integrated transmitter with efficiencies above 90% was designed to operate between 1 MHz and 14 MHz. The circuit design employs 0.18-um high-voltage CMOS technology. Simulations are presented to verify the operation of the circuit.
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页码：29 / 32
页数：4
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