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:
Mar. 31, 2009
Filed:
Sep. 10, 2007
Wade G. Johnson, Oxford, MI (US);
Wade G. Johnson, Oxford, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
An apparatus is provided for a switching interface for a first receiver, a second receiver, and a resistor ladder. A first terminal is coupled to a first resistor of the resistor ladder. A second terminal is coupled to the first resistor. A third terminal is coupled to a reference voltage. A switch has a first state coupling the first terminal to the third terminal and a second state coupling the second terminal to the third terminal. A first analog-to-digital (A/D) converter is coupled to the resistor ladder and the first receiver. The first A/D is configured to compare a first voltage with a second voltage to determine if the switch is positioned in the first state or the second state. A second analog-to-digital (A/D) converter is coupled to the resistor ladder and the second receiver and also configured to perform a voltage comparison.