公开(公告)号：US12033717B2

公开(公告)日：2024-07-09

申请号：US17903578

申请日：2022-09-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jaehyeok Baek ,  Daehyun Kwon ,  Hyejung Kwon ,  Donggun An ,  Daewoong Lee

IPC: G11C7/10

CPC classification number: G11C7/1048 ,  G11C2207/2254

Abstract: A calibration circuit includes a first, second and third pull-up units each connected to a first power supply node, and first and second pull-down units each connected to a second power supply node. A first code generator is configured to generate a first code by comparing a voltage of a pad at which the first pull-up unit is connected to an external resistor with a reference voltage, and a second code generator is configured to generate a second code by comparing a voltage of a first intermediate node with the reference voltage and output the second code to the first and second pull-down units. A third code generator is configured to generate a third code by comparing a voltage of a second intermediate node between the second pull-down unit and the third pull-up unit with the reference voltage.