Circuitry for measurement of electrochemical cells
AssigneeCirrus Logic, Inc.
InventorsJohn P. Lesso, James T. Deas
Life of this patent
Estimating the term…
Abstract
Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising: a converter, comprising: a first converter input configured to receive the analyte signal; a second converter input; and a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal; a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output; and a feedback path between the filter output and the second converter input.
Claims29
Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising:
- a converter, comprising:
- a first converter input configured to receive the analyte signal;
- a second converter input;
- and
- a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal;
- a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output;
- and
- a feedback path between the filter output and the second converter input;
- wherein the feedback path is a configurable feedback path;
- and
- wherein the circuitry is operable in an open loop mode in which the configurable feedback path is broken and the loop filter is bypassed, and a closed loop mode in which the configurable feedback path is closed.
Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising:
- a converter, having a first converter input for receiving the analyte signal, a second converter input and a converter output for outputting a converted analyte signal, the converter configured to establish, on the first converter input, a voltage equal to a voltage provided to the second converter input;
- a loop filter configured filter the converted analyte signal to generate a filtered analyte signal at a filter output;
- a feedback path between the filter output and the second converter input.
Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising:
- a converter, comprising:
- a first converter input configured to receive the analyte signal;
- a second converter input;
- and
- a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal;
- a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output;
- and
- a feedback path between the filter output and the second converter input;
- wherein the converter comprises a transimpedance amplifier (TIA);
- and
- wherein the loop filter comprises a feedforward impedance of the TIA, the feedforward impedance coupled between the converter output and the first converter input.
Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising:
- a converter, comprising:
- a first converter input configured to receive the analyte signal;
- a second converter input;
- and
- a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal;
- a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output;
- and
- a feedback path between the filter output and the second converter input;
- wherein the converter is configured to establish, on the first converter input, a voltage equal to a voltage provided to the second converter input.
An integrated circuit (IC), comprising:
- first channel circuitry for processing a first analyte signal from a first electrochemical sensor;
- and
- second channel circuitry for processing a second analyte signal from a second electrochemical sensor,
- wherein the first and second channels each comprise:
- a converter, comprising:
- a first converter input configured to receive the analyte signal;
- a second converter input;
- and
- a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal;
- a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output;
- and
- a feedback path between the filter output and the second converter input.
A system comprising:
- an electrochemical cell comprising a counter electrode and a first working electrode;
- and
- circuitry for processing an analyte signal obtained from the electrochemical cell, the circuitry comprising:
- a converter, comprising:
- a first converter input configured to receive the analyte signal;
- a second converter input;
- and
- a converter output configured to output a converted analyte signal, the converter configured to generate the converted analyte signal in dependence on the analyte signal;
- a loop filter configured to filter a signal derived from the converted analyte signal to obtain a filtered analyte signal at a filter output;
- and
- a feedback path between the filter output and the second converter input.
Dependencies are inferred from the claim text.