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. 30, 1990
Filed:
May. 12, 1989
Applicant:
Inventor:
Cecil H Kaplinsky, Palo Alto, CA (US);
Assignee:
Plus Logic, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307465 ; 3072021 ; 307468 ;
Abstract
A programmable logic device that provides an AND gate array connected to an OR gate array connected to a third logic level, a logic expander module. The module provides programmable selection of any of 16 one- and two-variable logic functiosn or any of 256 one-, two- and three-variable logic functions. In one embodiment, the invention uses logic function gates such as AND, OR, XOR and inverter gates to form the logic functions. In a second embodiment and a third embodiment, a look-up table and an array of pass transistors, respectively, are used to form the logic functions.