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:
Aug. 19, 2008
Filed:
Oct. 26, 2006
Ashraf K. Kamel, Indianapolis, IN (US);
Robert W Koseluk, Carmel, IN (US);
Kevin M. Gertiser, Kokomo, IN (US);
Larry R. Hach, Kokomo, IN (US);
Ashraf K. Kamel, Indianapolis, IN (US);
Robert W Koseluk, Carmel, IN (US);
Kevin M. Gertiser, Kokomo, IN (US);
Larry R. Hach, Kokomo, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A sensor interface filter having adjustable gain and Q is provided. The sensor interface includes a first operational amplifier coupled to gain circuitry, a gain stage, and a resistor. The gain circuitry and gain stage are electrically coupled to each other. The gain stage includes a gain stage switch, and is coupled to control circuitry. The control circuitry controls the state of the gain stage switch to vary the number of feedback current paths providing feedback to the inverting input of the first operational amplifier, altering the gain provided by the first operational amplifier. The sensor interface further includes a second operational amplifier coupled to filter circuitry and feedback switches. The feedback switches are coupled to the control circuitry, which controls the state of the feedback switches to vary the gain provided by the second operational amplifier and the filter Q of the sensor interface. A method is also provided.