公开(公告)号：US20240127871A1

公开(公告)日：2024-04-18

申请号：US18235848

申请日：2023-08-19

Applicant: Samsung Electronics Co., Ltd.

Inventor： Donggun An ,  Jaehyeok Baek ,  Sungyong Cho ,  Moonchul Choi

IPC: G11C7/10

CPC classification number: G11C7/1048 ,  G11C2207/2254

Abstract: A ZQ calibration circuit included in a semiconductor memory device includes a reference voltage selector configured to output a reference voltage selected from among a first reference voltage and a second reference voltage generated based on a first supply voltage and a second supply voltage, in response to a selection signal, a ZQ engine configured to generate a pull-up code and a pull-down code based on the selected reference voltage, and a loop selector configured to output the selection signal according to whether each of the pull-up code and the pull-down code is toggled. Levels of the first and second reference voltages are different from each other, smaller than a level of the first supply voltage, and greater than a level of the second supply voltage.

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.

公开(公告)号：US20230403040A1

公开(公告)日：2023-12-14

申请号：US18189521

申请日：2023-03-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Moon-Chul Choi ,  Sung-Yong Cho ,  Jaehyeok Baek ,  Donggun An

IPC: H04B1/04 ,  H04B7/005

CPC classification number: H04B1/0458 ,  H04B7/005 ,  H04B1/0475

Abstract: In a transmitter circuit, an impedance calibration circuit is configured to generate an impedance code for impedance matching, an encoder is configured to receive the impedance code and to generate a delay compensation signal based on the impedance code. A delay circuit is configured to output delay data that are delayed from input data by a delay value determined based on the delay compensation signal. A feed-forward equalizer is configured to receive the input data and the delay data, and to equalize the input data based on a main coefficient used for the input data and an equalization coefficient used for the delay data to generate transmission data.

公开(公告)号：US12149269B2

公开(公告)日：2024-11-19

申请号：US18189521

申请日：2023-03-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Moon-Chul Choi ,  Sung-Yong Cho ,  Jaehyeok Baek ,  Donggun An

IPC: H04B1/3827 ,  H04B1/04 ,  H04B7/005

Abstract: In a transmitter circuit, an impedance calibration circuit is configured to generate an impedance code for impedance matching, an encoder is configured to receive the impedance code and to generate a delay compensation signal based on the impedance code. A delay circuit is configured to output delay data that are delayed from input data by a delay value determined based on the delay compensation signal. A feed-forward equalizer is configured to receive the input data and the delay data, and to equalize the input data based on a main coefficient used for the input data and an equalization coefficient used for the delay data to generate transmission data.