Spinal cord stimulator system
First Claim
1. A wireless charger for automatically tuning an optimum frequency to inductively charge a rechargeable battery of an implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body, the wireless charger comprising:
- a processor;
a charging coil adapted to be wirelessly coupled to a receiving coil of the IPG to charge the rechargeable battery;
a frequency generator configured to generate a charging signal under control of the processor;
a power amplifier configured to receive the charging signal and generate an amplified charging signal under control of the charging signal;
a reflected impedance sensor coupled to the charging coil to detect a reflected impedance of the charging coil;
an optimization circuit coupled to the reflected impedance sensor and adapted to select an optimum frequency of the charging signal supplied to the charging coil based on the detected reflected impedances of a plurality of charging frequencies in a selected frequency range.
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Accused Products
Abstract
A wireless charger for automatically tuning an optimum frequency to inductively charge a rechargeable battery of an implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body is provided. The charging coil in the charger is wirelessly coupled to a receiving coil of the IPG to charge the rechargeable battery. An optimization circuit detects a reflected impedance of the charging coil through a reflected impedance sensor, and select an optimum frequency of a charging signal supplied to the charging coil based on the detected reflected impedances of a plurality of charging frequencies in a selected frequency range. Advantageously, the optimum charging frequency provides a more efficient way to charge the IPG'"'"'s rechargeable battery.
380 Citations
9 Claims
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1. A wireless charger for automatically tuning an optimum frequency to inductively charge a rechargeable battery of an implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body, the wireless charger comprising:
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a processor; a charging coil adapted to be wirelessly coupled to a receiving coil of the IPG to charge the rechargeable battery; a frequency generator configured to generate a charging signal under control of the processor; a power amplifier configured to receive the charging signal and generate an amplified charging signal under control of the charging signal; a reflected impedance sensor coupled to the charging coil to detect a reflected impedance of the charging coil; an optimization circuit coupled to the reflected impedance sensor and adapted to select an optimum frequency of the charging signal supplied to the charging coil based on the detected reflected impedances of a plurality of charging frequencies in a selected frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification