Potentiostatic circuit arrangement on a biosensor for digitisation of the measured current

US7914655B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Alexander Frey · Munich, DE
• Christian Paulus · Weilheim, DE
• Meinrad Schienle · Ottobrunn, DE
• Roland Thewes · Puchheim, DE

Key dates

• Filing date: May 11, 2004
• Grant date: Mar 29, 2011
• Expiry date: Oct 13, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12Q1/6825
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A circuit arrangement, an electrochemical sensor, a sensor arrangement, and a method for processing a current signal provided by a sensor electrode are disclosed. The circuit arrangement includes a sensor electrode, a first circuit unit, electrically coupled to the sensor electrode and a second circuit unit, including a first capacitor, whereby the first circuit arrangement is embodied to hold the electrical potential of the sensor electrode in a given first reference range about a set electrical potential and, when the sensor electrode potential falls outside the first reference range, the first capacitor and the sensor electrode are coupled such that a matching of the electrical potentials is possible. The second circuit unit is embodied such that, when the electrical potential of the first capacitor falls outside a second reference range, this event is detected and the first capacitor brought to a first electrical reference potential.