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. 13, 1982
Filed:
Jan. 09, 1980
Nicky M Johnson, Los Altos, CA (US);
Lawrence M Blaser, Mountain View, CA (US);
Fairchild Camera & Instrument Corp., Mountain View, CA (US);
Abstract
An electronic advance and ignition control system incorporating the advance utilizes a fixed advance threshold compared with amplitude of an RPM sensitive input waveform from a distributor in combination with a timing circuit, which establishes a predetermined RPM rate above which the advance operates. The electronic advance accurately duplicates the function of conventional centrifugal and vacuum and advance retard mechanisms in controlling timing of an ignition coil drive signal. The electronic advance is provided as part of an ignition control integrated circuit which can operate in a stand alone mode or share control of the ignition system with a microprocessor through interface circuits also forming part of the integrated circuit.