Microprocessor controlled class E driver
First Claim
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1. A charger comprising:
- a charging coil magnetically coupleable with an implantable device to recharge the implantable device;
a class E driver electrically connected to the charging coil, wherein the class E driver comprises;
a switching circuit, wherein the switching circuit is switched by application of a first voltage to the switching circuit; and
a current sensor positioned to sense a current passing through the charging coil; and
a processor electrically connected to the class E driver to receive data indicative of the current passing through the charging coil and electrically connected to the class E driver to control the switching circuit via the application of the first voltage to the switching circuit, wherein the processor is controllable according to stored instructions to receive data indicative of the current passing through the charging coil and control the switching circuit in response to the received data to adjust a drive frequency of the class E driver based on the zero crossing time.
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Abstract
A charger including a class E power driver, a frequency-shift keying (“FSK”) module, and a processor. The processor can receive data relating to the operation of the class E power driver and can control the class E power driver based on the received data relating to the operation of the class E power driver. The processor can additionally control the FSK module to modulate the natural frequency of the class E power transformer to thereby allow the simultaneous recharging of an implantable device and the transmission of data to the implantable device. The processor can additionally compensate for propagation delays by adjusting switching times.
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Citations
18 Claims
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1. A charger comprising:
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a charging coil magnetically coupleable with an implantable device to recharge the implantable device; a class E driver electrically connected to the charging coil, wherein the class E driver comprises; a switching circuit, wherein the switching circuit is switched by application of a first voltage to the switching circuit; and a current sensor positioned to sense a current passing through the charging coil; and a processor electrically connected to the class E driver to receive data indicative of the current passing through the charging coil and electrically connected to the class E driver to control the switching circuit via the application of the first voltage to the switching circuit, wherein the processor is controllable according to stored instructions to receive data indicative of the current passing through the charging coil and control the switching circuit in response to the received data to adjust a drive frequency of the class E driver based on the zero crossing time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification