The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2015
Filed:
Apr. 06, 2004
Berndt Cramer, Leonberg, DE;
Andy Tiefenbach, Farmington Hills, MI (US);
Bernd Schumann, Rutesheim, DE;
Thorsten Ochs, Schwieberdingen, DE;
Helge Schichlein, Karlsruhe, DE;
Berndt Cramer, Leonberg, DE;
Andy Tiefenbach, Farmington Hills, MI (US);
Bernd Schumann, Rutesheim, DE;
Thorsten Ochs, Schwieberdingen, DE;
Helge Schichlein, Karlsruhe, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
Abstract
A device for operating a gas sensor having both at least one pump cell and a measuring cell is provided. A constant current source is provided that makes available a pump current which acts upon an outer electrode of the pump cell. The constant current source provides at least two different amounts of the pump current and/or allows for an alternating operation having ON phases and OFF phases, the duration of the ON phases/OFF phases being specifiable. The device may be largely implemented in digital circuitry and adapted to different requirements.