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:
Apr. 28, 2015
Filed:
Oct. 04, 2012
Applicant:
Elpida Memory, Inc., Tokyo, JP;
Inventors:
Nakaba Kaiwa, Tokyo, JP;
Yutaka Ikeda, Tokyo, JP;
Assignee:
PS4 Luxco S.A.R.L., Luxembourg, LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 19/003 (2006.01); H03H 7/40 (2006.01); H04L 25/02 (2006.01); H03K 21/38 (2006.01);
U.S. Cl.
CPC ...
H03H 7/40 (2013.01); H04L 25/0278 (2013.01); H03K 21/38 (2013.01);
Abstract
A device, comprising an output terminal; an output circuit coupled to the output terminal and having an adjustable impedance; and an impedance adjustment circuit adjusting stepwise the adjustable impedance so as to head toward a first reference impedance. The impedance adjustment circuit changes the adjustable impedance by a first amount when the adjustable impedance is within a first range, and changes the adjustable impedance by a second amount when the adjustable impedance is out of the first range. The first amount is smaller than the second amount.