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:
Aug. 18, 1992
Filed:
Nov. 20, 1990
Applicant:
Inventors:
Masato Hamamoto, Ohme, JP;
Toshio Yamada, Hamura, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3073031 ; 307269 ; 328 55 ; 328 63 ; 328 72 ; 371-1 ; 375118 ;
Abstract
Dummy power source wirings connected to a power source wiring are arranged in empty regions among the signal wirings that cross the clock wirings, the dummy power source wirings being arranged over or under the clock wirings in a manner to cross the clock wirings. The dummy power source wirings are formed to equalize the capacitances of the wirings whose lengths should be equalized among, for example, the clock distributing circuits or among the clock drivers.