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, 1983
Filed:
Nov. 25, 1980
George A Haag, Colorado Springs, CO (US);
O Douglas Fogg, Loveland, CO (US);
Gordon A Greenley, Colorado Springs, CO (US);
Steve A Shepard, Colorado Springs, CO (US);
F Duncan Terry, Meridan, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A logic state analyzer stores into a data acquisition memory only state data meeting preselected qualification state criteria chosen to weed out state data not of interest among the totality of states occuring within a collection of digital signals. The data acquisition memory retains only the last m-many states stored therein. A selectable integer k, o.ltoreq.k.ltoreq.m, determines how many additional storage operations are performed for qualified state data following the detection of a preselected trigger condition. The actual number of states occurring in the collection of digital signals after the trigger condition but before the storage of the kth qualified data state can be many times the value of k. Qualifying the state data prior to storage allows a modest size data acquisition memory to do the work of a much larger memory and spares the user the task of sorting through much state data known not to be of interest. The preselected qualification criteria may include don't-cares in the definition of the qualification state, as well as the logical OR'ing of a plurality of such qualification states.