FREQUENCY SHIFT KEYING (FSK) MAGNETIC TELEMETRY FOR IMPLANTABLE MEDICAL DEVICES AND ASSOCIATED SYSTEMS AND METHODS
First Claim
Patent Images
1. A telemetry receive unit, comprising:
- a coil unit;
a single-bit analog to digital converter (ADC) having an analog input coupled to the coil unit;
a finite impulse response filter (FIR) coupled to a digital output of the single-bit ADC; and
an accumulator that produces one or more data recognition signals corresponding to sampled bits at least temporarily stored at the FIR filter, the accumulator being coupled to one or more filter taps of the FIR filter.
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Abstract
A telemetry receive unit for use in an implantable medical device or system can include a coil unit, a single-bit analog to digital converter (ADC), a finite impulse response filter (FIR) coupled to the single-bit ADC, and an accumulator coupled to one or more filter taps of the FIR filter. The accumulator, in operation, can produce one or more data recognition signals corresponding to sampled bits at least temporarily stored at the FIR filter. In several examples, the data recognition signals discriminate between frequency modulated signals that are received at the coil unit, including frequency shift keying (FSK) modulated signals.
41 Citations
24 Claims
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1. A telemetry receive unit, comprising:
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a coil unit; a single-bit analog to digital converter (ADC) having an analog input coupled to the coil unit; a finite impulse response filter (FIR) coupled to a digital output of the single-bit ADC; and an accumulator that produces one or more data recognition signals corresponding to sampled bits at least temporarily stored at the FIR filter, the accumulator being coupled to one or more filter taps of the FIR filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15)
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8. A patient-implantable device, comprising:
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a housing that is implantable within an individual'"'"'s body; and a telemetry receive unit at least partially disposed within the housing and including; a coil unit that generates an electrical signal in the presence of a time varying magnetic signal; an analog to digital converter (ADC) that samples the electrical signal at periodic intervals and outputs only one bit of sampled data at individual periodic intervals; and a sample evaluation unit that receives the sampled electrical signal.
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16. A device that is implantable within an individual'"'"'s body, the device comprising:
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a first circuit that receives communications via frequency shift keying (FSK) modulated time varying magnetic signals and converts the time varying magnetic signals into FSK modulated electrical signals; a second circuit that samples the electrical signals, the second circuit having a sampling size of one bit; and a third circuit that sums sampled bits of the second circuit to produce FSK mark and space recognition signals. - View Dependent Claims (17)
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18. A method for communicating with an implanted device within an individual'"'"'s body, the method comprising:
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producing a frequency modulated electrical signal based on a frequency modulated time varying magnetic signal; sampling the electrical signal at periodic intervals, the sampled electrical signal having only bit that is associated with an individual periodic interval; and summing individual sampled bits to produce one or more data recognition signals that discriminate between at least two frequencies of the electrical signal. - View Dependent Claims (19, 20, 21, 22)
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23. A method for communicating with an implanted device within an individual'"'"'s body, the method comprising:
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producing a time varying magnetic signal that is frequency shift keying (FSK) modulated; and using the time varying magnetic signal to create an FSK modulated electrical signal at the implanted device, the electrical signal being communicated to a single-bit analog to digital converter (ADC) of the implanted device, and the single-bit ADC being used to at least partially demodulate the electrical signal. - View Dependent Claims (24)
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Specification