RF COUPLED, IMPLANTABLE MEDICAL DEVICE WITH RECHARGEABLE BACK-UP POWER SOURCE

摘要

The RF coupled implantable medical system comprises: a transmitting unit (12); a receiving unit (14) including an implantable, electrically operated, medical device; the transmitting unit including RF energy transmitting circuitry (64), RF signal receiving circuitry (38) and first control circuitry (26) coupled to the RF energy transmitting circuitry and to the RF signal receiving circuitry for controlling the amount of RF energy transmitted to the receiving unit; the receiving unit including RF energy receiving circuitry (60), RF signal transmitting circuitry, a rechargeable power supply (44) coupled to the RF energy receiving circuitry and second control circuitry for adjusting the charging current flowing into the rechargeable battery coupled to the rechargeable power supply, to the RF energy receiving circuitry, to the RF signal transmitting circuitry and to the implanted medical device; and mode selection circuitry for setting the receiving unit to operate in one of the following modes: (1) "RF only", (2) "battery only" or (3) "combination of both".