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:
Jan. 18, 1994
Filed:
May. 06, 1991
Yoshinobu Nakagome, Hachioji, JP;
Eiji Kume, Matsuyama, JP;
Kiyoo Itoh, Higashikurume, JP;
Hitoshi Tanaka, Tachikawa; all of, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corporation, Tokyo, JP;
Abstract
A semiconductor integrated circuit is disclosed, in which a group of sense amplifiers activated at the same time by a selection signal on a selection signal line are divided into a plurality of blocks, and a power-source line for driving sense amplifiers is formed for each sense amplifier block so as to cross the selection signal line. Alternatively, an input/output line is divided into a plurality of sub-input/output lines, and a plurality of input/output lines are formed so that each input/output line crosses its sub-input/output lines, to form a hierarchical structure with respect to input/output lines. Thus, the load capacitance of each power-source line is reduced, and the time constant of each of the charging and discharging of the load capacitance is decreased. That is, the above semiconductor integrated circuit can operate at high speed.