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. 24, 1996
Filed:
Feb. 21, 1995
Goro Kitsukawa, Hinodemachi, JP;
Takao Watanabe, Kokubunji, JP;
Ryoichi Hori, Hinodemachi, JP;
Noriyuki Honma, Kokubunji, JP;
Kunihiko Yamaguchi, Sayama, JP;
Kiyoo Itoh, Higashikurume, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A dynamic random access memory is provided which includes word lines for accessing memory cells, data lines for transferring information from the memory cells, and rewrite amplifiers connected to the data lines for rewriting the information to corresponding memory cells. Read pre-amplifiers are also provided for sensing the information, together with common data lines for transferring output signals of the read pre-amplifiers. Each of the read pre-amplifiers has two insulated gate field-effect transistors, gates of which are connected to the data lines, and sources/drains of which are connected with the common data lines, such that the common data lines do not form current paths with the data lines. In addition, the read pre-amplifiers are activated before the rewrite amplifiers.