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:
Nov. 30, 2021
Filed:
Jun. 12, 2020
SK Hynix Inc., Gyeonggi-do, KR;
Eun Ji Choi, Gyeonggi-do, KR;
Jin Ha Hwang, Gyeonggi-do, KR;
Keun Seon Ahn, Gyeonggi-do, KR;
Yo Han Jeong, Gyeonggi-do, KR;
SK hynix Inc., Gyeonggi-do, KR;
Abstract
An impedance calibration circuit may include: a first driver having an impedance calibrated according to a first impedance control code, and configured to drive an output terminal according to first data; a second driver having an impedance calibrated according to a second impedance control code, and configured to drive the output terminal according to second data; and an impedance calibration circuit configured to calibrate the first impedance control code to a first target value set to a resistance value of an external resistor, and calibrate the second impedance control code to a second target value different from the resistance value of the external resistor.