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:
Sep. 18, 2001
Filed:
Jun. 01, 1999
Applicant:
Inventors:
Bernhard Bloemer, Stuttgart, DE;
Bernd Schumann, Rutesheim, DE;
Assignee:
Robert Bosch Gmbh, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B 3/00 ; F02M 7/00 ;
U.S. Cl.
CPC ...
F02B 3/00 ; F02M 7/00 ;
Abstract
A method of operating a gas sensor having two sensor electrodes whose output signal is evaluated in an evaluation circuit connected downstream of the sensor electrodes, the sensor electrodes being arranged in an ion-conducting ceramic and being therefor heated by an electrical heater, characterized in that a pulsewidth modulated heater voltage signal is applied to the heater; and that a compensation signal is superposed on the output signal of the sensor electrodes, the compensation signal being essentially formed so as to be counterclocked and inverted to the pulsewidth modulated heater voltage signal.