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. 27, 2009
Filed:
May. 17, 2006
Gen Koshita, Tokyo, JP;
Gen Koshita, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A termination circuit that adjusts differences in the resistance values of wiring-layer resistance and transistor ON resistance so that a desired termination resistance value is obtained. A wiring-layer resistanceis connected between an input terminal, which connects to an input circuit, and a first node; a transistor groupis connected between the first node and ground; a wiring-layer resistanceis connected between the first node and a second node; and a transistor groupis connected between the second node and ground. Furthermore, a wiring-layer resistanceis connected between the input terminaland a third node; a transistor groupis connected between the third node and power source VDD; a wiring-layer resistanceis connected between the third node and a fourth node, and a transistor groupis connected between a fourth node and power source VDD. The transistor groupscomprise one or a plurality of transistors that are turned ON or OFF by respective control signals BNto BN, BNto BN, BPto BPand BPto BP