Transmitter system for wireless communication with implanted devices
First Claim
1. A transmitter system for wireless communication with a remote receiver, comprising:
- a transmitter circuit, said transmitter circuit including a resonant network oscillating at a resonant frequency to generate signals for transmission to the remote receiver,current sensing means coupled to said transmitter circuit for sensing current consumed by the same, anda controller generating a drive signal and outputting said drive signal to said transmitter circuit to control said resonance frequency thereof, said controller being coupled to said current sensing means to monitor said sensed current and changing said drive signal to adjust said resonance frequency of said resonant network once said sensed current exceeds a predetermined current value to minimize said sensed current consumed by said transmitter circuit.
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Accused Products
Abstract
A transmitter system for wireless communication with implanted medical devices includes a transmitter circuit having a resonant network the resonant frequency of which is adjusted by a feedback circuit in order to minimize the current drain from the power source and maximizing the power source life. The transmitter system may be powered by a power supply block which uses commonly available RS-232 signals of a host computer as a raw power source, combined with a high value storage capacitor to provide power for the wireless medical data programmer. A feedback circuit monitors the charging current as well as voltage impressed across the storage capacitor in order to maintain the charging current at maximum level during the charging time and in order to stop the charging once the full charge of the storage capacitor has been reached.
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Citations
29 Claims
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1. A transmitter system for wireless communication with a remote receiver, comprising:
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a transmitter circuit, said transmitter circuit including a resonant network oscillating at a resonant frequency to generate signals for transmission to the remote receiver, current sensing means coupled to said transmitter circuit for sensing current consumed by the same, and a controller generating a drive signal and outputting said drive signal to said transmitter circuit to control said resonance frequency thereof, said controller being coupled to said current sensing means to monitor said sensed current and changing said drive signal to adjust said resonance frequency of said resonant network once said sensed current exceeds a predetermined current value to minimize said sensed current consumed by said transmitter circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transmitter system for wireless communication with a remote receiver, comprising:
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a transmitter circuit generating signals and transmitting the generated signals to the remote receiver; and a power supply block coupled to said transmitter circuit to supply power thereto, said power supply block comprising; a. a current limit switching circuit coupled to a host computer to receive input power therefrom, said current limit switching circuit including a plurality of current limiting structures switchable to control charging current output from said current limit switching circuit at an output thereof, b. a storage capacitor coupled to said output of said current limit switching circuit for being charged with said controlled charging current, and said storage capacitor being further coupled to said transmitter circuit to supply thereto a discharge current of said storage capacitor, and c. a feed-back circuit coupled between said storage capacitor and said current limit switching circuit, said feed-back circuit being adapted to monitor said charging current supplied to said storage capacitor and to switch said current limit switching circuit to a respective current limiting structure thereof to keep said charging current at a predetermined level thereof for the duration of the charging time. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification