{
  "$type": "site.standard.document",
  "description": "The present invention relates to an external charger for wirelessly providing energy to an implantable medical device, IMD, comprising a charging coil configured when energized to produce a magnetic field to wirelessly provide energy to the IMD as a coupled system, wherein the charging coil is…",
  "path": "/patents/1387033",
  "publishedAt": "2026-06-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "A61N1/36125",
    "BOSTON SCIENT NEUROMODULATION CORP [US]"
  ],
  "textContent": "The present invention relates to an external charger for wirelessly providing energy to an implantable medical device, IMD, comprising a charging coil configured when energized to produce a magnetic field to wirelessly provide energy to the IMD as a coupled system, wherein the charging coil is energized by a drive signal with a frequency, 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 adjust a frequency of the drive signal until a phase angle between the drive signal and the induced signal equals zero.",
  "title": "EXTERNAL CHARGER FOR AN IMPLANTABLE MEDICAL DEVICE FOR DETERMINING POSITION AND OPTIMIZING POWER TRANSMISSION USING RESONANT FREQUENCY AS DETERMINED FROM AT LEAST ONE SENSE COIL"
}