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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0322068 (1994-10-12) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 305 인용 특허 : 0 |
A tissue stimulating system includes an external transmitter for transmitting a data signal to an implanted stimulator. The implanted stimulator includes a processor for generating stimulation signals for application to a plurality of tissue stimulating electrodes through respective isolated output
A tissue stimulating system includes an external transmitter for transmitting a data signal to an implanted stimulator. The implanted stimulator includes a processor for generating stimulation signals for application to a plurality of tissue stimulating electrodes through respective isolated output channels. The implanted stimulator also includes a power supply that extracts a raw power signal from the data signal. A voltage downconverter generates at least four separate voltages from the extracted raw power signal by alternately connecting at least four capacitors in series across the raw power signal, thereby providing at least four output voltages, and then connecting the capacitors in parallel to transfer the charge stored thereon to a storage capacitor, which serves as the power source for portions of the stimulator. A selected one of the output voltages from the voltage downconverter is applied to an isolated refresh voltage capacitor in each output channel, where it controls a voltage controlled current source. The processor selectively monitors the electrodes and/or voltages generated in the stimulator and generates status indicating/measurement signals for transmission to the external transmitter. The external processor receives and processes the status indicating/measurement signals and uses the information therefrom to control the amount of power transmitted to the stimulator.
An implanted human tissue stimulator comprising: receiver means for receiving a data signal from an external transmitter, the data signal comprising a series of data frames containing an end of frame signal, each data frame comprising a plurality of data words, each data word defining an amplitude f
An implanted human tissue stimulator comprising: receiver means for receiving a data signal from an external transmitter, the data signal comprising a series of data frames containing an end of frame signal, each data frame comprising a plurality of data words, each data word defining an amplitude for a tissue stimulating signal for a different output channel of the tissue stimulator, and a command word for controlling a processor means in the tissue stimulator; power supply means coupled to said receiver means for extracting a raw power signal from the data signal and generating at least one power supply voltage from the raw power signal and distributing the at least one power supply voltage throughout the human tissue stimulator to provide operating power for the human tissue stimulator; a plurality of output channels, each having a tissue stimulating electrode connected thereto; and processor means for serially processing the plurality of data words and command word in each data frame received by the receiver means, said processor means comprising a command detector means responsive to the command words received by said receiver means for controlling the functions of the processor means, data word latching means for successively storing the data words received in a data frame by said receiver means, and switch means for successively coupling amplitude voltages representative of output signals from the data word latching means to successive ones of the output channels; and wherein each of the plurality of output channels includes: refresh voltage controller means for generating an isolated refresh voltage for the output channel, said refresh voltage controller means including at least one flying capacitor and means for alternately connecting the at least one flying capacitor to receive the at least one power supply voltage from the power supply means and then disconnecting the at least one flying capacitor from the power supply means to provide the isolated refresh voltage for the output channel, and a voltage controlled current source powered by the isolated refresh voltage provided by the refresh voltage controller means for amplitude controlling, in accordance with the amplitude voltages coupled from the switch means, tissue stimulating signals to the stimulating electrode of the output channel.
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