Semiconductor gas sensor having additional functionalities of the signal-generating electrode

US8424366B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Dirk Liemersdorf · Sachsenheim, DE
• Richard Fix · Gerlingen, DE

Key dates

• Filing date: May 16, 2008
• Grant date: Apr 23, 2013
• Expiry date: Jun 7, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4141
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method for operating a semiconductor gas sensor, the gas sensor including at least one gas-sensitive electrode, the method may provide for impression of a voltage sequence on the gas-sensitive electrode. The operation may take place in a measuring cycle which is subdivided into at least one initialization phase and at least one subsequent measuring phase, a first voltage sequence being impressed on the gas-sensitive electrode during the initialization phase, a second voltage sequence being impressed on the gas-sensitive electrode during the measuring phase, and the first voltage sequence differing from the second voltage sequence. A semiconductor gas sensor may be provided for implementing the method according to the invention, and a method may relate to the use of such a sensor.