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. 08, 1994
Filed:
Oct. 29, 1991
Hermann-Josef Wiegand, Baiersdorf, DE;
Klaus Haken, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A fast, flexible hardware comparator is implemented using read-write memory chips (RAMs). Characteristic data is stored at a specific address corresponding to the reference value, which can be read out only in case of agreement when addressed by the actual value. To reduce the addresses to be decoded in the RAMs, the required address lines are evenly distributed among several RAMs. The present invention can be used as an address comparator in software testing, and as a reference/actual value comparator in digital control circuits, if the address difference from the reference value address in each case is additionally stored in the RAMs.