Programmable Pulse Generator by Envelope Detection for Implantable Medical Devices

Abstract

Pulse generators in implantable medical devices need to be programmable and miniaturized. However, the existing designs of pulse generator cannot satisfy both of the requirements at the same time. This paper presents a novel design of pulse generators applying magnetic resonance, which is composed of a class-C inverter and an envelope detector, for implantable medical devices. Through simulation and tests, we verify the superiority of our design in programmability of the output pulse signal and miniaturization of the implants, compared with the conventional designs. The amplitude, frequency and duty cycle of the output pulse signal of the implanted receiver can be modulated by controlling the input signal of the transmitter outside the human body. And the footprint of the implanted receiver can be miniaturized to 12 mm × 14 mm × 5 mm, which is smaller than half the size of most of the existing products.