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. 21, 2017
Filed:
Dec. 27, 2016
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Seok-Jin Cho, Seoul, KR;
Tae-Young Oh, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
An impedance calibration circuit includes a first code generator, a first code storing circuit, a second code generator and a second code storing circuit. The first code generator generates a pull-up control code obtained from a result of comparing a target output high level (VOH) voltage with a first voltage of a first node. The first code storing circuit stores the pull-up control code when the target VOH voltage becomes the same as the first voltage. The second code generator generates a pull-down control code obtained from a result of comparing the VOH voltage with a second voltage of a second node. The second storing circuit stores the pull-down control code when the target VOH voltage becomes the same as the second voltage. The first code storing circuit and the second code storing circuit store pull-up control code and pull-down control code pairs respectively.