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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-0293261 (1999-04-16) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 358 인용 특허 : 48 |
A receiving and filtering circuit includes an antenna, a demodulator circuit coupled to the antenna, and a digital median filter that removes high frequency content of a demodulated digital information signal to produce a filtered digital information signal corresponding to an analog data signal tra
A receiving and filtering circuit includes an antenna, a demodulator circuit coupled to the antenna, and a digital median filter that removes high frequency content of a demodulated digital information signal to produce a filtered digital information signal corresponding to an analog data signal transmitted by a body implantable medical apparatus. The digital filter may include a multiple stage delay line coupled to a multiple tap selection device, a plurality of delay blocks coupled to a register, or a multiple stage delay line coupled to a voting unit. The voting unit produces a first binary output in response to a majority of delay line stages storing a first value, and produces a second binary output in response to a majority of delay line stages storing a second value. The digital filter may also comprise a digital signal processor. The digital filter may include a first filter block and a second filter block. The second filter block may be selectively activated or bypassed. The first filter block removes high frequency content of the digital information signal and the second filter block reduces high frequency noise at an edge of a data bit transition. A control circuit, coupled to the digital filter, provides for respective selection of data rate and frequency response characteristics of the digital filter. The digital filter may be implemented in a Field-Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC).
[ What is claimed is:] [1.]1. A receiver for a modulated analog telemetry signal transmitted from a body implantable medical device, comprising:an antenna;an amplifier directly coupled to the antenna to provide an unfiltered signal representative of the modulated analog telemetry signal;a demodulato
[ What is claimed is:] [1.]1. A receiver for a modulated analog telemetry signal transmitted from a body implantable medical device, comprising:an antenna;an amplifier directly coupled to the antenna to provide an unfiltered signal representative of the modulated analog telemetry signal;a demodulator circuit coupled to the amplifier, the demodulator circuit demodulating the unfiltered signal to produce a digital information signal; anda digital filter, coupled to the demodulator, that removes high frequency content of the digital information signal to produce a filtered digital information signal.
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