초록 ▼

Magnetic Vector Steering (MVS) and Half-Cycle Amplitude Modulation (HCAM) are novel techniques which enhance the powering and control of multiple arbitrarily oriented implant devices. Together, these techniques enable arbitrarily oriented implants to receive power and command, programming, and contr

Magnetic Vector Steering (MVS) and Half-Cycle Amplitude Modulation (HCAM) are novel techniques which enhance the powering and control of multiple arbitrarily oriented implant devices. Together, these techniques enable arbitrarily oriented implants to receive power and command, programming, and control information in an efficient manner that preserves battery life and transmission time while reducing overall implant device bulk. By steering the aggregate magnetic field from a near-orthogonal set of AC-energized coils, selected implants can be powered or communicated with at desired times. Communication with individual implants can also be enhanced through half-cycle amplitude modulation--a technique that allows bit rates up to twice the energizing frequency. Unlike prior art systems, power and data transfer can be realized over the same frequency channel.

대표청구항 ▼

[ What is claimed is:] [4.] A method for powering one or more arbitrarily oriented inductively coupled devices using an energizing coil assembly, the method comprising:(a) inductively powering said arbitrarily oriented inductively coupled devices using an energizing coil;(b) sensing a magnetic field

[ What is claimed is:] [4.] A method for powering one or more arbitrarily oriented inductively coupled devices using an energizing coil assembly, the method comprising:(a) inductively powering said arbitrarily oriented inductively coupled devices using an energizing coil;(b) sensing a magnetic field of said energizing coil for determining the strength and phase of said energizing coil's magnetic field;(c) monitoring a prescribed current within said energizing coil and producing a driving signal to maintain a fixed phase delay between said prescribed current and a reference signal; and(d) employing said driving signal to control said energizing coil.