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:
Feb. 14, 2023
Filed:
Jun. 14, 2021
Applicant:
Samsung Electronics Co., Ltd., Suwon-si, KR;
Inventors:
Hyunsuk Kang, Seoul, KR;
Jungjune Park, Seoul, KR;
Kyoungtae Kang, Seoul, KR;
Junha Lee, Seoul, KR;
Byunghoon Jeong, Hwaseong-si, KR;
Assignee:
SAMSUNG ELECTRONICS CO., LTD., Suwon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 5/14 (2006.01); G11C 7/10 (2006.01);
U.S. Cl.
CPC ...
G11C 5/147 (2013.01); G11C 7/1006 (2013.01); G11C 7/1048 (2013.01);
Abstract
A high resolution impedance adjustment (ZQ) calibration method using a hidden least significant bit (HLSB) is provided. The high resolution ZQ calibration method generates a data input/output (DQ) code of n+1 bits without a calibration time increase by adding the hidden least significant bit (HLSB) to a ZQ code of n bits output in a ZQ calibration operation of an impedance adjustment (ZQ) pad. A change in a termination resistance of the DQ pad is reduced as small as possible by the DQ code of n+1 bits.