Implantable sensor electrodes and electronic circuitry
First Claim
1. A sensor system comprising:
- a catalytic agent;
a first electrode pair, comprising;
a first electrode; and
a second electrode that wraps at least partially around the first electrode;
a second electrode pair, comprising;
a third electrode; and
a fourth electrode that wraps at least partially around the third electrode; and
a spacer abutting the first electrode pair and the second electrode pair;
wherein the first electrode pair and the second electrode pair are for sensing parameters;
wherein the catalytic agent is located in a position to affect at least one parameter;
wherein the first electrode pair and the second electrode pair are positioned such that cross coupling between the second electrode and the third electrode and between the fourth electrode and the first electrode is reduced;
wherein the spacer is for cooperating with the catalytic agent, the first electrode pair and the second electrode pair such that the first electrode pair and the second electrode pair concurrently produce a first electrical value and a second electrical value, respectively, the second electrical value being different from the first electrical value; and
wherein the sensor system further comprises an electrical circuit to determine the at least one parameter based on the difference between the first electrical value and the second electrical value.
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Accused Products
Abstract
An electronic circuit for sensing an output of a sensor having at least one electrode pair and circuitry for obtaining and processing the sensor output. The electrode pair may be laid out such that one electrode is wrapped around the other electrode in a U-shaped fashion. The electronic circuitry may include, among other things, a line interface for interfacing with input/output lines, a rectifier in parallel with the line interface, a counter connected to the line interface and a data converter connected to the counter and the electrode pair. The data converter may be a current-to-frequency converter. In addition, the rectifier may derive power for the electronic circuit from communication pulses received on the input/output lines.
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Citations
33 Claims
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1. A sensor system comprising:
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a catalytic agent; a first electrode pair, comprising; a first electrode; and a second electrode that wraps at least partially around the first electrode; a second electrode pair, comprising; a third electrode; and a fourth electrode that wraps at least partially around the third electrode; and a spacer abutting the first electrode pair and the second electrode pair; wherein the first electrode pair and the second electrode pair are for sensing parameters; wherein the catalytic agent is located in a position to affect at least one parameter; wherein the first electrode pair and the second electrode pair are positioned such that cross coupling between the second electrode and the third electrode and between the fourth electrode and the first electrode is reduced; wherein the spacer is for cooperating with the catalytic agent, the first electrode pair and the second electrode pair such that the first electrode pair and the second electrode pair concurrently produce a first electrical value and a second electrical value, respectively, the second electrical value being different from the first electrical value; and wherein the sensor system further comprises an electrical circuit to determine the at least one parameter based on the difference between the first electrical value and the second electrical value. - 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 sensor system comprising:
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a catalytic agent; a first electrode pair, comprising; a first electrode; and a second electrode that wraps at least partially around the first electrode; and a second electrode pair, comprising; a third electrode; and a fourth electrode that wraps at least partially around the third electrode; wherein the first electrode pair and the second electrode pair are for sensing parameters; wherein the catalytic agent is located in a position to affect at least one parameter; wherein the first electrode pair and the second electrode pair are positioned such that cross coupling between the second electrode and the third electrode and between the fourth electrode and the first electrode is reduced; wherein the sensor system further comprises a substrate; wherein the first electrode pair and the second electrode pair are formed on a first surface of the substrate; wherein the sensor system further comprises a spacer; wherein the spacer is located on top of the first electrode pair and on top of the second electrode pair; wherein there is an indentation in a portion of the spacer that is on top of the second electrode pair; and wherein the catalytic agent is located in the indentation of the spacer. - View Dependent Claims (21)
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22. A sensor system comprising:
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a substrate; a first electrode pair formed on a first surface of the substrate for sensing parameters, comprising; a first electrode; and a second electrode that wraps at least partially around the first electrode; a second electrode pair formed on the first surface of the substrate for sensing parameters, comprising; a third electrode; and a fourth electrode that wraps at least partially around the third electrode; circuitry located on a second surface of the substrate for processing the parameters sensed by the first and second electrode pairs; and a spacer abutting the first electrode pair and the second electrode pair; wherein the circuitry is enclosed in a hermetically sealed casing; wherein the spacer is for cooperating with the first electrode pair and the second electrode pair such that the first electrode pair and the second electrode pair concurrently produce a first electrical value and a second electrical value, respectively, the second electrical value being different from the first electrical value; and wherein the circuitry is for determining at least one parameter based on the difference between the first electrical value and the second electrical value. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A sensor system comprising:
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a substrate; a first electrode pair formed on a first surface of the substrate for sensing parameters, comprising; a first electrode; and a second electrode that wraps at least partially around the first electrode; a second electrode pair formed on the first surface of the substrate for sensing parameters, comprising; a third electrode; and a fourth electrode that wraps at least partially around the third electrode; and circuitry located on a second surface of the substrate for processing the parameters sensed by the first and second electrode pairs; wherein the circuitry is enclosed in a hermetically sealed casing; wherein the sensor system further comprises a spacer and a catalytic agent; wherein the spacer is located on top of the first electrode pair and on top of the second electrode pair; wherein there is an indentation in a portion of the spacer that is on top of the second electrode pair; and wherein the catalytic agent is located in the indentation of the spacer.
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29. A sensor system comprising:
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a first electrode pair for sensing parameters, comprising; a first electrode; and a second electrode that wraps at least partially around the first electrode; a second electrode pair for sensing parameters, comprising; a third electrode; and a fourth electrode that wraps at least partially around the third electrode; and circuitry for processing the parameters sensed by the first and second electrode pairs; wherein the first electrode pair and the second electrode pair are positioned such that cross coupling between the second electrode and the third electrode and between the fourth electrode and the first electrode is reduced; wherein the sensor system further comprises a spacer abutting the first electrode pair and the second electrode pair; wherein the spacer is for cooperating with the first electrode pair and the second electrode pair such that the first electrode pair and the second electrode pair concurrently produce a first electrical value and a second electrical value, respectively, the second electrical value being different from the first electrical value; and wherein the circuitry is for determining at least one parameter based on the difference between the first electrical value and the second electrical value. - View Dependent Claims (30, 31, 32, 33)
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Specification