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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.:

US 10020808 B1

PDFFull Text
Date of Patent:
Jul. 10, 2018

Filed:

Jul. 01, 2016

Impedance calibration circuit and semiconductor memory apparatus having the same

Applicant:

SK Hynix Inc., Icheon-si, Gyeonggi-do, KR;

Inventor:

Dong Wook Jang, Icheon-si, KR;

Assignee:

SK hynix Inc., Icheon-si, Gyeonggi-do, KR;

Attorney:

William Park & Associates Ltd.

Primary Examiner:

Jany Richardson

Int. Cl.
CPC ...
H03K 19/00 (2006.01); G11C 7/12 (2006.01); G11C 7/10 (2006.01); G11C 7/22 (2006.01);
U.S. Cl.
CPC ...
H03K 19/0005 (2013.01); G11C 7/10 (2013.01); G11C 7/12 (2013.01); G11C 7/22 (2013.01);
Abstract

An impedance calibration circuit includes a first reference resistor electrically coupled to a calibration pad, a second reference resistor which is coupled to the first reference resistor in parallel and a resistance value of the second reference resistor is varied according to an operation voltage mode, and a calibration circuit electrically coupled to the calibration pad and configured to generate a calibration code according to a resistance value formed by the first reference resistor and the second reference resistor and calibrate an impedance value in the calibration pad according to the calibration code.

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Quick Actions:

Jang, Dong. (2018). Impedance calibration circuit and semiconductor memory apparatus having the same (U.S. Patent No. 10020808). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10020808

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