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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0208883 (1998-12-09) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 341 인용 특허 : 30 |
A method and apparatus for detecting an RF signal transmitted between an implantable medical device (IMD) and an external medical device programmer in a telemetry session and discriminating the telemetry transmitted RF signal from transient and steady state noise corrupting it. The external programm
A method and apparatus for detecting an RF signal transmitted between an implantable medical device (IMD) and an external medical device programmer in a telemetry session and discriminating the telemetry transmitted RF signal from transient and steady state noise corrupting it. The external programmer includes a programmer telemetry antenna tuned circuit adapted to be driven into oscillation to generate tuned circuit output signals in response to telemetry uplink transmissions of telemetry uplink signals from the IMD, wherein the tuned circuit output signals can exhibit noise artifacts due to contamination by electrical noise. An RF telemetry receiver section detects and demodulates the telemetry uplink signals from the tuned circuit output signals and provides a demodulated uplink signal having a demodulated uplink signal amplitude that varies with time as a function of telemetry uplink signal amplitudes and noise artifacts. The receiver section includes an adaptive comparator circuit for comparing the demodulated uplink signal amplitude with an adaptive threshold signal and providing a receiver output signal when the demodulated uplink signal amplitude exceeds the adaptive threshold amplitude of the adaptive threshold signal.
[What is claimed is:] [1.]a programmer telemetry antenna tuned circuit comprising at least one antenna coil and at least one tuning capacitor, the programmer telemetry tuned circuit adapted to be driven into oscillation to generate tuned circuit output signals in response to telemetry uplink transmi
[What is claimed is:] [1.]a programmer telemetry antenna tuned circuit comprising at least one antenna coil and at least one tuning capacitor, the programmer telemetry tuned circuit adapted to be driven into oscillation to generate tuned circuit output signals in response to telemetry uplink transmissions of telemetry uplink signals and in response to electrical noise, whereby the tuned circuit output signals can exhibit noise artifacts due to contamination by such electrical noise;a telemetry receiver section for detecting and demodulating the telemetry uplink signals from the tuned circuit output signals and providing a demodulated uplink signal having a demodulated uplink signal amplitude that varies with time as a function of telemetry uplink signal amplitudes and noise artifacts;an adaptive comparator circuit for comparing the demodulated uplink signal amplitude with an adaptive threshold signal and providing a receiver output signal when the demodulated uplink signal amplitude exceeds the adaptive threshold amplitude of the adaptive threshold signal, the comparator circuit further comprisingmeans for filtering and integrating the demodulated uplink signal to derive an adaptive threshold amplitude that is proportional to and adapts to the amplitude of noise artifacts in the demodulated uplink signal; andcomparison means having a first input terminal for receiving the demodulated uplink signal and a second input terminal for receiving the adaptive threshold signal and an output terminal for comparing the demodulated uplink signal amplitude with the adaptive threshold amplitude and providing the receiver output signal at the output terminal only when the telemetry signal amplitude in the demodulated uplink signal exceeds the adaptive threshold amplitude.
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