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:
Dec. 07, 1993
Filed:
Aug. 28, 1991
Fujitsu Limited, Kawasaki, JP;
Abstract
A programmable memory device includes memory cells arranged at cross points of word lines and bit lines, a selecting part for selectively decreasing potentials of the word lines, and a writing part for selectively supplying programming currents to the memory cells via the bit lines. Programming current absorbing transistors have first terminals respectively connected to the word lines, second terminals set at a predetermined potential, and bases, and a common load element connected between a node and a programming voltage line. A plurality of base current supplying circuits, which are respectively coupled to the programming current absorbing transistors and connected in common to the node, turn ON the programming current absorbing transistors related to word lines selected by the selecting part so that base currents pass from the programming voltage line to the bases of the programming current absorbing transistors via the common load element and the base current supplying circuits.