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:
Oct. 10, 2017
Filed:
Jan. 18, 2017
Applicant:
SK Hynix Inc., Icheon-si, Gyeonggi-do, KR;
Inventors:
Seung Geun Baek, Seoul, KR;
Jae Il Kim, Icheon-si, KR;
Assignee:
SK hynix Inc., Icheon-si, Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/16 (2006.01); H03K 19/003 (2006.01); H03H 11/28 (2006.01);
U.S. Cl.
CPC ...
H03H 11/28 (2013.01);
Abstract
An impedance calibration circuit is disclosed, which relates to a technology for improving precision of pad resistance. The impedance calibration circuit includes: a first On Die Termination (ODT) circuit selected by a first selection signal, configured to tune its own resistance using a first code signal, and output a first resistance value to an output terminal; and a second ODT circuit selected by a second selection signal, configured to tune its own resistance using a second code signal, and output a second resistance value to the output terminal.