Implantable medical device communication system with macro and micro sampling intervals
First Claim
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1. A medical device comprising:
- device circuitry for controlling the operation of the medical device and for processing data;
a receiver configured to sample at a macro sampling interval to detect presence of a first portion of a transmission signal on a communication channel that includes a first pattern of bits and, upon detecting the first portion of the transmission signal, the receiver is configured to sample at a micro sampling interval to detect presence of a second portion of the transmission signal on the communication channel that includes a second pattern of bits equivalent to the first portion of the transmission signal with a 180 degree phase shift, and thereafter receive data contained in the transmission signal,wherein the macro sampling interval corresponds to a time between scheduled sampling time slots configured according to an external clock and the micro sampling interval corresponds to a period of time that is smaller than the macro sampling interval such that a duration of a series of samples spaced by the micro sampling interval is less than the macro sampling interval.
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Abstract
A communication signal is communicated between an implantable medical device including an implant transceiver and an external unit including an external unit transceiver. At least one of the transceivers includes a receiver capable of sampling a communication channel for the communication signal at times based on a macro sampling interval and a micro sampling interval. The sampling includes a series of micro samples. The duration of the series of micro samples is less than the macro sampling interval.
161 Citations
24 Claims
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1. A medical device comprising:
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device circuitry for controlling the operation of the medical device and for processing data; a receiver configured to sample at a macro sampling interval to detect presence of a first portion of a transmission signal on a communication channel that includes a first pattern of bits and, upon detecting the first portion of the transmission signal, the receiver is configured to sample at a micro sampling interval to detect presence of a second portion of the transmission signal on the communication channel that includes a second pattern of bits equivalent to the first portion of the transmission signal with a 180 degree phase shift, and thereafter receive data contained in the transmission signal, wherein the macro sampling interval corresponds to a time between scheduled sampling time slots configured according to an external clock and the micro sampling interval corresponds to a period of time that is smaller than the macro sampling interval such that a duration of a series of samples spaced by the micro sampling interval is less than the macro sampling interval. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication system comprising:
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an implantable medical device including an implant transceiver; an external unit including an external unit transceiver, wherein the transceivers of the implantable medical device and the external unit are configured to operate in a synchronous communication mode in which both transceivers recognize scheduled time slots for communication; wherein at least one of the transceivers includes a receiver that is configured to sample at a macro sampling interval for a first portion of a communication that includes a first pattern of bits and, upon detecting the first portion of the communication, the receiver is configured to sample at a micro sampling interval for a second portion of the communication that includes a second pattern of bits equivalent to the first portion of the transmission signal with a 180 degree phase shift, and thereafter receive data contained in the communication; wherein the macro sampling interval corresponds to a time between scheduled sampling time slots and the micro sampling interval corresponds to a period of time that is smaller than the macro sampling interval such that a duration of a series of samples spaced by the micro sampling interval is less than the macro sampling interval. - View Dependent Claims (8, 9, 10, 11, 12, 23, 24)
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13. A medical device configured to receive a transmission bit stream that includes a preamble segment, an attention segment, a frame sync segment and data, the medical device comprising:
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device circuitry configured to control the operation of the medical device and for processing data; and a receiver configured to sample for the preamble segment of the transmission bit stream using a macro sampling interval, to sample for the attention segment the transmission bit stream using a micro sampling interval upon detecting the preamble segment of the transmission bit stream, wherein the macro sampling interval is greater than the micro sampling interval, and to remain on to receive the frame sync segment and the data, wherein the receiver is configured to sample at the macro sampling interval to detect a preamble segment having a first pattern of bits and upon detecting the preamble segment the receiver is configured to sample at the micro sampling interval to detect an attention segment having a second pattern of bits equivalent to the first pattern of bits of the preamble segment with a 180 degree phase shift. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification