US Patent No. 10,363,426

EXTERNAL CHARGER FOR AN IMPLANTABLE MEDICAL DEVICE FOR DETERMINING POSITION USING PHASE ANGLE OR A PLURALITY OF PARAMETERS AS DETERMINED FROM AT LEAST ONE SENSE COIL


Patent No. 10,363,426
Issue Date July 30, 2019
Title External Charger For An Implantable Medical Device For Determining Position Using Phase Angle Or A Plurality Of Parameters As Determined From At Least One Sense Coil
Inventorship Daniel Aghassian, Glendale, CA (US)
Thomas W. Stouffer, Chatsworth, CA (US)
Jonathan Larcom, South Pasadena, CA (US)
Gaurav Gupta, Valencia, CA (US)
Assignee Boston Scientific Neuromodulation Corporation, Valencia, CA (US)

Claim of US Patent No. 10,363,426

1. An external charger for wirelessly providing energy to an implantable medical device (IMD), comprising:a charging coil configured when energized by a drive signal to produce a magnetic field to wirelessly provide energy to the IMD;
a sense coil, wherein the sense coil is configured to be induced by the magnetic field with an induced signal affected by a position of the charging coil with respect to the IMD; and
control circuitry configured to
determine a phase angle between the induced signal and the drive signal, and
determine using the phase angle the position of the charging coil with respect to the IMD.