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:
Feb. 21, 1989
Filed:
Oct. 02, 1987
James S Golab, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An integrated circuit has a signature circuit which provides information concerning the integrated circuit itself. This information can, for example, specify that redundancy has or has not been implemented. Other potential information can relate to the particular mask set, the speed of the integrated circuit, and/or the manufacturer. The information is provided on a normal output terminal of the integrated circuit. A load is selectively coupled to the output terminal in response to an input signal of the integrated circuit if a particular node is programmed to a first logic state. If the particular node is programmed to a second logic state, the load is not responsive to the input signal. A load variation then indicates one condition of the integrated circuit, and no load variation indicates another condition. Numerous outputs can be similarly used to provide additional amounts of information according to some selected code.