Standby biasing of electrochemical sensor to reduce sensor stabilization time during measurement

Patent metadata

Field	Value
Publication number	US-8926809-B2
Application number	US-201314032418-A
Country	US
Kind code	B2
Filing date	Sep 20, 2013
Priority date	Jan 25, 2013
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

An eye-mountable device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a surface of an eye. The electrochemical sensor applies a stabilization voltage between a working electrode and a reference electrode to allow the amperometric current to stabilize before powering measurement electronics configured to measure the amperometric current and communicate the measured amperometric current. The electrochemical sensor consumes less power while applying the stabilization voltage than during the measurement. The measurement is initiated in response to receiving a measurement signal at an antenna in the eye-mountable device.

First claim

What is claimed is:

1. A method comprising:
applying a stabilization voltage between a working electrode and a reference electrode in an eye-mountable device, wherein the stabilization voltage is sufficient to cause an analyte to undergo an electrochemical reaction at the working electrode;
while the stabilization voltage is being applied, wirelessly receiving a measurement signal at an antenna in the eye-mountable device;
responsive to receiving the measurement signal, activa…

Assignees

• Google Inc

Inventors

• Pletcher Nathan
• Otis Brian

Classifications

• A61B2560/0219

  Human Necessities · mapped topic

• G01N27/3271

  Physics · mapped topic

• A61B5/0031

  Human Necessities · mapped topic

• A61B5/1495

  Human Necessities · mapped topic

• A61B5/0004 Primary

  Human Necessities · mapped topic