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Title:
IMPEDANCE CALIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/080574
Kind Code:
A1
Abstract:
An impedance calibration device according to an embodiment of the present disclosure comprises: a target driver module including a pull-up resistor circuit and a pull-down resistor circuit; a resistance measurement module for measuring each of a pull-up resistance value of the pull-up resistor circuit and a pull-down resistance value of the pull-down resistor circuit; and a control module which, in order to calibrate the pull-up resistance value and the pull-down resistance value, generates a pull-up code for adjusting the pull-up resistance value and a pull-down code for adjusting the pull-down resistance value. The control module updates the pull-down code on the basis of the pull-down resistance value and a predetermined target pull-down resistance value, and updates the pull-up code on the basis of the pull-up resistance value and a predetermined target pull-up resistance value.

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Inventors:
SEONG CHANGKYUNG (KR)
LEE MANHYUNG (KR)
Application Number:
PCT/KR2023/013557
Publication Date:
April 18, 2024
Filing Date:
September 11, 2023
Export Citation:
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Assignee:
QUALITAS SEMICONDUCTOR CO LTD (KR)
International Classes:
H04L25/02; G11C7/12; H03H11/28; H04L25/12
Domestic Patent References:
WO2022141800A12022-07-07
Foreign References:
KR20040055879A2004-06-30
JP2009246725A2009-10-22
KR20220013072A2022-02-04
KR101024244B12011-03-29
KR20110129030A2011-12-01
Attorney, Agent or Firm:
BEATBOARD IP LAW FIRM (KR)
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