Data communication system for control of transcutaneous energy transmission to an implantable medical device
First Claim
1. An implantable device, comprising:
- a battery capable of being recharged by a transcutaneous energy transmission device;
a coil that selectively couples to said battery via a switch, said coil receiving energy from said transcutaneous energy transmission device for charging said battery;
a current sensor coupled to said battery for detecting the amount of current flowing through said battery and for providing an output signal indicative of the current flowing through said battery;
a multiplexing circuitry coupled to said battery for detecting voltage of the battery, said multiplexing circuitry also receiving the output signal indicative of the amount of current flowing through said battery, said multiplexer circuit generating a signal indicating either the amount of current through the battery or the voltage of the battery;
output circuitry coupled to said multiplexing circuitry for receiving the signal from said multiplexing; and
wherein said output circuitry selectively opens and closes said switch to transmit encoded signals through said coil to said transcutaneous energy transmission device indicative of the amount of current through said battery and the voltage of the battery.
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Accused Products
Abstract
A data communication system for control of transcutaneous energy transmission to an implantable medical device is disclosed having an implantable medical device with rechargeable batteries and a single coil that is employed both for energy transmission and data telemetry. Control circuitry in the implantable device senses battery voltage and current through the battery, encodes those values by use of a multiplexer, and transmits the sensed and encoded values through the coil to an external energy transmission device. The external device includes a coil that is electromagnetically coupled to the coil in the implantable device for receiving the encoded signals and for transmitting energy to the implantable device. The external device decodes the transmitted values and transmits those to a controller for controlling energy transmission.
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Citations
49 Claims
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1. An implantable device, comprising:
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a battery capable of being recharged by a transcutaneous energy transmission device; a coil that selectively couples to said battery via a switch, said coil receiving energy from said transcutaneous energy transmission device for charging said battery; a current sensor coupled to said battery for detecting the amount of current flowing through said battery and for providing an output signal indicative of the current flowing through said battery; a multiplexing circuitry coupled to said battery for detecting voltage of the battery, said multiplexing circuitry also receiving the output signal indicative of the amount of current flowing through said battery, said multiplexer circuit generating a signal indicating either the amount of current through the battery or the voltage of the battery; output circuitry coupled to said multiplexing circuitry for receiving the signal from said multiplexing; and wherein said output circuitry selectively opens and closes said switch to transmit encoded signals through said coil to said transcutaneous energy transmission device indicative of the amount of current through said battery and the voltage of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A transcutaneous energy transmission system for simultaneously recharging a battery in an implanted device while providing encoded signals indicative of the voltage charge on the battery, comprising:
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an external transmission device which includes; a coil; a current sensor coupled to said coil for sensing current through the coil; detection circuitry coupled to said current sensor for detecting said encoded signal in said sensed current and in response generating a pulse; a timer coupled to said detection circuitry for measuring pulse duration; and a counter coupled to said detection circuitry for measuring time between pulses; an implantable device powered by said battery, said implantable device including; a coil for coupling to said coil in said external transmission device; a switch selectively coupling said coil to said battery; a current sensor coupled to said battery for detecting the amount of current flowing through said battery and for providing an output signal indicative of the current flowing through said battery; a multiplexing circuitry coupled to said battery for detecting voltage of the battery, said multiplexing circuitry also receiving the output signal indicative of the amount of current flowing through said battery, said multiplexer circuit generating a signal indicating either the amount of current through the battery or the voltage of the battery; output circuitry coupled to said multiplexing circuitry for receiving the signal from said multiplexing; and wherein said output circuitry selectively opens and closes said switch to transmit encoded signals through said coil to said transcutaneous energy transmission device indicative of the amount of current through said battery and the voltage of the battery. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A transcutaneous energy transmission system for transmitting encoded signals indicative of the voltage charge on a battery during periods when battery recharging is interrupted, comprising:
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an external transmission device which includes; a coil; an edge detector coupled to said for detecting said encoded signal received by said coil and in response generating a pulse; a first counter coupled to said edge detector for measuring pulse duration; and a second counter coupled to said edge detector for measuring time between pulses; an implantable device powered by said battery, said implantable device including; a coil for coupling to said coil in said external transmission device; a switch selectively coupling said coil to said battery; a current sensor coupled to said battery for detecting the amount of current flowing through said battery and for providing an output signal indicative of the current flowing through said battery; a multiplexing circuitry coupled to said battery for detecting voltage of the battery, said multiplexing circuitry also receiving the output signal indicative of the amount of current flowing through said battery, said multiplexer circuit generating a signal indicating either the amount of current through the battery or the voltage of the battery; output circuitry coupled to said multiplexing circuitry for receiving the signal from said multiplexing; and wherein said output circuitry selectively opens and closes said switch to transmit encoded signals through said coil to said transcutaneous energy transmission device indicative of the amount of current through said battery and the voltage of the battery. - View Dependent Claims (45, 46, 47, 48, 49)
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Specification