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:
Oct. 28, 1986
Filed:
Aug. 06, 1984
Gregory A Williams, Elk Grove Village, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A dual mode timer circuit has first and second two-input NOR gates with inputs connected to receive a trigger pulse and outputs respectively coupled to first and second RC charging networks. An output NOR gate has its two inputs connected to the RC charging networks respectively, and its output connected to an output terminal. A control input voltage signal is coupled to a fourth NOR gate whose output is connected to control activation of the second RC charging network which has a shorter time constant than the first RC network. The output signal duration is dependent upon which RC network is effective. The output terminal is connected to the other inputs of the first and second NOR gates to render the circuit independent of trigger pulse duration.