Implantable device with digital waveform telemetry
First Claim
1. An integrated circuit to process at least one signal of signals of interest, the integrated circuit comprising:
- at least two leads to conduct the signals of interest, wherein a first lead of the at least two leads includes an atrial tip conductor and an atrial ring conductor, and wherein a second lead of the at least two leads includes a ventricular tip conductor and a ventricular ring conductor;
an atrial sense amplifier coupled to the first lead of the at least two leads;
a ventricular sense amplifier coupled to the second lead of the at least two leads;
an atrial ring-to-can intracardiac electrogram amplifier coupled to the first lead of the at least two leads;
a ventricular ring-to-can intracardiac electrogram amplifier coupled to the second lead of the at least two leads;
an impedance sensor coupled to one of the at least two leads a switch bank coupled to the atrial sense amplifier and the ventricular sense amplifier, wherein the switch bank includes a plurality of switching devices; and
first and second programmable gain amplifiers coupled to the switch bank.
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Abstract
A technique for acquiring and accessing information from a medical implantable device is provided. Analog waveforms of interest are sensed and processed by signal acquisition circuitry. Analog parameters of interest are applied to selector switches which are controlled by a logic circuit. The logic circuit is also coupled an A/D converter for converting the analog signals to digital values. The digital values are stored in dedicated registers and are available for telemetry to an external device upon receipt of a request or prompt signal. When a digitized value is accessed and telemetered, the control logic circuit changes the conductive state of the selector switches to apply the corresponding analog signal to the A/D converter. The resulting digital value is applied to the corresponding register to refresh the accessed and telemetered value. The technique permits the external device to request and configure the implanted device to send only digitized values of interest. The technique also makes efficient use of the A/D converter, which consumes energy only as needed to refresh the memory when digital values are accessed and telemetered.
68 Citations
21 Claims
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1. An integrated circuit to process at least one signal of signals of interest, the integrated circuit comprising:
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at least two leads to conduct the signals of interest, wherein a first lead of the at least two leads includes an atrial tip conductor and an atrial ring conductor, and wherein a second lead of the at least two leads includes a ventricular tip conductor and a ventricular ring conductor;
an atrial sense amplifier coupled to the first lead of the at least two leads;
a ventricular sense amplifier coupled to the second lead of the at least two leads;
an atrial ring-to-can intracardiac electrogram amplifier coupled to the first lead of the at least two leads;
a ventricular ring-to-can intracardiac electrogram amplifier coupled to the second lead of the at least two leads;
an impedance sensor coupled to one of the at least two leads a switch bank coupled to the atrial sense amplifier and the ventricular sense amplifier, wherein the switch bank includes a plurality of switching devices; and
first and second programmable gain amplifiers coupled to the switch bank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system comprising:
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at least two leads to conduct at least one signal of interest;
a processing circuit receptive to the at least one signal of interest to provide at least one processed signal, wherein the processing circuit includes at least one ring-to-can intracardiac electrogram amplifier, wherein the at least one ring-to-can intracardiac electrogram amplifier includes a processing circuit amplifier that is adapted to be programmable;
a switching circuit receptive to the at least one processed signal, wherein the switching circuit includes a plurality of switches, wherein the switching circuit includes at least one switching circuit amplifier that is adapted to be programmable;
an analog-to-digital conversion circuit coupled to the switching circuit, wherein the analog-to-digital conversion circuit having a dynamic range; and
a microprocessor to program the processing circuit amplifier and the at least one switching circuit amplifier so as to be compatible with the dynamic range of the analog to-digital conversion circuit, wherein the plurality of switches of the switching circuit is configured by the microprocessor. - View Dependent Claims (21)
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Specification