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:
Apr. 10, 1979
Filed:
Sep. 14, 1977
Edward J Loper, Jr, Santa Barbara, CA (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A system for determining the value of an angle represented by first and second analog signals having amplitudes which are a function of the SIN and COS of the angle. The SIN and COS signals are full wave demodulated in such a manner that the demodulated signals are always of opposite polarity and the smaller of the two signals is continuously integrated in an integrator while the larger of the two signals is sample data integrated in the integrator to maintain the output of the integrator within predefined upper and lower limits. Angle computation is then performed as a function of the ratio of the number of complete half cycles of the demodulated signals during a fixed time interval plus the change in the output of the integrator since the previous time interval.