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. 01, 1994
Filed:
Aug. 24, 1992
Kalyan P Gokhale, Shelby Township, Macomb County, MI (US);
Thaddeus Schroeder, Rochester Hills, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A signal conditioning circuit which converts multiple analog signals received from an encoder into a multi-bit digital signal, corresponding to the angular position of a rotary object, which is independent of any common mode disturbances such as temperature, humidity, ambient light and aging. At any given time, at least one of the analog signals is at a maximum voltage and at least one of the analog signals is at a minimum voltage. At no time are all of the analog signals simultaneously at a maximum or simultaneously at a minimum. The signal conditioning circuit continuously detects the maximum and minimum values of the analog signals. A midpoint of the maximum and minimum values is determined and compared with the original analog signals. For all values of the analog signals greater than the midpoint value, a binary logic level of 1 is outputted. For all values of the analog signals less than the midpoint value, a binary logic level of 0 is outputted. There is one comparator and corresponding binary output for each analog signal. In combination, the comparators form the necessary multi-bit digital signal.