Patent ID: 7079901
Filing Date: 2006-07-18
Classification: A61N,Y10S

Abstract:
1. A method of reliably and efficiently transmitting data and power to an implantable medical device from an external power amplifier, wherein the implantable medical device includes an implanted coil, and the external power amplifier includes a primary coil; the method comprising: the steps of: (a) generating a carrier signal in the power amplifier; (b) inductively coupling the carrier signal from the primary coil to the implanted coil through a resonant circuit having a Q of at least 10 that includes the primary coil and the implanted coil when only power is to be transmitted to the implantable medical device; (c) modulating the carrier signal with data when data is to be transmitted to the implantable medical device; and (d) inductively coupling the modulated carrier signal from the primary coil to the implanted coil through a resonant circuit having a Q of less than about 4 that includes the primary coil and the implanted coil.