Measurement circuitry
AssigneeCirrus Logic, Inc.
InventorJohn P. Lesso
Life of this patent
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Abstract
Measurement circuitry comprising: a first half bridge, comprising: a first impedance coupled between an input voltage node for receiving an input voltage and a first node; and a second impedance coupled between the first node and a reference voltage node, the first impedance or the second impedance comprising a first voltage-controlled oscillator (VCO) having a first input coupled to the first node and a first output for outputting a first oscillating signal having a first frequency proportional to a current flowing in the half bridge.
Claims18
Measurement circuitry, comprising:
- an input voltage node;
- a reference voltage node;
- an output node;
- and
- a first half-bridge comprising:
- a first electrochemical sensor configured to sense one or more analytes;
- and
- a first voltage-controlled oscillator (VCO);
- wherein the first-half bridge is coupled between the input voltage node and the reference voltage node, wherein the first electrochemical sensor is coupled in series with the first VCO between the input voltage node and the reference voltage node, and wherein the first VCO is configured to output a first oscillating signal having a first frequency via the output node and wherein the first frequency is proportional to a current flowing from the input voltage node to the reference voltage node.
A continuous glucose monitor comprising a measurement circuitry comprising:
- an input voltage node;
- a reference voltage node;
- an output node;
- and
- a first half-bridge comprising:
- a first electrochemical sensor configured to sense one or more analytes;
- and
- a first voltage-controlled oscillator (VCO);
- wherein the first-half bridge is coupled between the input voltage node and the reference voltage node, wherein the first electrochemical sensor is coupled in series with the first VCO between the input voltage node and the reference voltage node, and wherein the first VCO is configured to output a first oscillating signal having a first frequency via the output node and wherein the first frequency is proportional to a current flowing from the input voltage node to the reference voltage node.
Dependencies are inferred from the claim text.