Samsung Electronics Co., Ltd.

Jeonghoon Baek

Dohyung Kim

Hwanwook Park

Dongyoon Seo

Wonseop Lee

Seunghee Mun

Jinoh Ahn

Bo-Ra Kim

Jaejun Lee

A module board and a memory module are provided. The module board includes a first branch line for connecting a clock signal terminal disposed on at least one surface to a first branch point; a first signal line for connecting the first branch point to a first module clock signal terminal; a second signal line for connecting the first module clock signal terminal to the kmodule clock signal terminal and a first termination resistance terminal; a third signal line for connecting the first branch point to a (k+1)module clock signal terminal; and a fourth signal line for connecting the (k+1)module clock signal terminal to a 2kmodule clock signal terminal and the second termination resistance terminal, wherein a length of the third signal line is greater than a sum of a length of the first signal line and a length of the second signal line.

Module board and memory module including the same

A memory system includes a plurality of memory devices on a printed circuit board, each of the memory devices including a plurality of external pads; a plurality of connection terminals formed on the printed circuit board, and electrically connected to respective ones of the external pads; and a plurality of signal lines formed on the printed circuit board to connect the connection terminals with the external pads, each of the signal lines between a corresponding connection terminal and a corresponding external pad and having a length. The plurality of memory devices are arranged at different distances from the plurality of connection terminals, and each signal line that connects a connection terminal to an external pad of a memory device either is connected to or does not connect a stub resistor depending on a length of the line.

Memory module and on-die termination setting method thereof

Growing community of inventors

Busan, South Korea

Jeonghoon Baek