Electronic biosensor arrangement

US8043563B2 · kind B2 · utility

Assignee

• Austrian Research Centers GmbH—ARC · AT

Inventors

• Christa Nohammer · Wien, AT
• Daniel Paulo Wiese Meneses Rocha · Porto Salvo, PT
• Caspar Petrus Laurentius van Vroonhoven · Marktoberdorf, DE
• Michael Vellekoop · Dronten, NL

Key dates

• Filing date: May 15, 2007
• Grant date: Oct 25, 2011
• Expiry date: Feb 18, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/3276
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electronic biosensor arrangement (1), comprising a receiving region (2) for biological material, a sensor-electrode arrangement (3) with sensor electrodes (3a, 3b) which intermesh in a comb-like manner being associated therewith, with which sensor electrodes (3a, 3b) a measuring circuit (5) is connectable for measuring an electrical measurement parameter on the sensor electrodes (3a, 3b) and influenced by biological material, wherein the sensor electrodes (3a, 3b) form a plurality of sensor capacitors (Csensor,1 to Csensor,N), with which electronic switching means (S2,1 to S2,N) driven by a control logic (8) are associated for connecting to earth or to a voltage source carrying a measurement voltage (Vdrive), respectively, comprising a reference capacitor (Cref), to which a switching means (S1) driven by the control logic (8) and arranged for optionally connecting to earth or to the measurement voltage (Vdrive) is likewise assigned, wherein the capacitors (Cref, Csensor1−Csensor, N) are also combined to a node (A), which is connected to an input (−) of a differential amplifier (10), and with which measurement capacitors (C0 to C5) having binary-weighted capacities (Cmin to 32Cmi…