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. 11, 1986
Filed:
Jan. 24, 1983
Ernest A Carter, Austin, TX (US);
John K Eitrheim, Austin, TX (US);
Dorothy M Wood, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A read-only-memory (ROM) having a plurality of enhancement and depletion transistors selectively arranged in an array with the gates of the transistors in each row connected in common to form word lines, and the current paths of the transistors in each column connected in series to form bit lines. The word lines are precharged and then allowed to float. The bit lines are then precharged, bootstrapping the word lines above the precharge level. A selected one of the word lines is thereafter discharged before one end of each of the bit lines is connected to ground. A selected bit line will either remain precharged or be discharged depending upon the type of transistor at the intersection of the selected word and bit lines.