Telemetry receiver for implantable device, incorporating digital signal processing
First Claim
1. Apparatus for receiving a modulated data signal transmitted from an implantable device, wherein the modulated data signal is modulated by a digital or an analog data signal in any of a plurality of distinct modulation modes, the apparatus comprising:
- front-end receiving means for receiving the modulated data signal from the implantable device, the front-end receiving means including means for amplifying and antialias filtering the received signal;
analog-to-digital converter means for sampling the amplified modulated data signal to produce a sequence of digitized samples; and
digital signal processing means for filtering the sequence of digitized samples using at least one of a plurality of bandpass filters and for demodulating the filtered sequence of digitized samples using at least one of a plurality of demodulators, including an amplitude demodulator, a frequency demodulator, and a phase demodulator, to produce a demodulated data signal.
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Accused Products
Abstract
An improved programmer apparatus for receiving digital data telemetered from an implantable device such as a heart pacemaker with substantially reduced hardware complexity and with convenient flexibility to adapt to data received in multiple modulation formats and data rates. The apparatus includes a conventional front-end receiver for receiving the data in both a reflected-impedance telemetry mode and an active telemetry mode, and it further includes a digital signal processor for efficiently processing data samples of the received telemetry data. Processing the received data in software allows for great processing flexibility, including a convenient reconfiguration to accommodate new modulation formats and data rates for implantable devices developed at a later time.
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Citations
18 Claims
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1. Apparatus for receiving a modulated data signal transmitted from an implantable device, wherein the modulated data signal is modulated by a digital or an analog data signal in any of a plurality of distinct modulation modes, the apparatus comprising:
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front-end receiving means for receiving the modulated data signal from the implantable device, the front-end receiving means including means for amplifying and antialias filtering the received signal; analog-to-digital converter means for sampling the amplified modulated data signal to produce a sequence of digitized samples; and digital signal processing means for filtering the sequence of digitized samples using at least one of a plurality of bandpass filters and for demodulating the filtered sequence of digitized samples using at least one of a plurality of demodulators, including an amplitude demodulator, a frequency demodulator, and a phase demodulator, to produce a demodulated data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A telemetry system for an implantable device, comprising:
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front-end receiving means for receiving a modulated data signal from the implantable device, the modulated data signal being modulated by one of a digital or an analog data signal in one of a plurality of distinct modulation modes, the receiving means including filtering means for amplifying and antialias filtering the received signal; analog-to-digital converter means for sampling the filtered modulated data signal to produce a sequence of digitized samples; and digital signal processing means for producing a demodulated data signal independent of the modulation mode used, the digital signal processing means including means for filtering the sequence of digitized samples using a plurality of filters and means for demodulating the filtered sequence of digitized samples using a plurality of demodulators; and means for selecting from the plurality of bandpass filters and for selecting from the plurality of demodulators in a sequential fashion until the modulated data signal has been demodulated. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification