公开(公告)号：US20210224156A1

公开(公告)日：2021-07-22

申请号：US16926000

申请日：2020-07-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： SUNGHYE CHO ,  KIJUN LEE ,  YEONGGEOL SONG ,  SUNGRAE KIM ,  CHANKI KIM ,  MYUNGKYU LEE ,  SANGUHN CHA

IPC: G06F11/10 ,  H03M13/15 ,  H03M13/00

Abstract: An error correction circuit of a semiconductor memory device includes an error correction code (ECC) encoder and an ECC decoder. The ECC encoder generates, based on a main data, a parity data using an ECC represented by a generation matrix and stores a codeword including the main data and the parity data in a target page of a memory cell array. The ECC decoder reads the codeword from the target page as a read codeword based on an address provided from outside the semiconductor memory device to generate different syndromes based on the read codeword and a parity check matrix which is based on the ECC, and applies the different syndromes to the main data in the read codeword to correct a single bit error when the single bit error exists in the main data or to correct two bit errors when the two bit errors occur in adjacent two memory cells in the target page.

公开(公告)号：US20190188078A1

公开(公告)日：2019-06-20

申请号：US16057855

申请日：2018-08-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： GEUNYEONG YU ,  BOHWAN JUN ,  KIJUN LEE ,  JUNJIN KONG ,  HONG-RAK SON

IPC: G06F11/10 ,  H03M13/11 ,  H03M13/00

CPC classification number: G06F11/1076 ,  H03M13/1105 ,  H03M13/1154 ,  H03M13/3972 ,  H03M13/616

Abstract: A method of operating a memory controller that performs decoding by using a parity check matrix corresponding to a convolution-type low density parity check (LDPC) code includes receiving a codeword from at least one memory device, the codeword including a first sub-codeword and a second sub-codeword; decoding a first sub-codeword into first data by using first sliding windows in a first direction, set based on a first sub-matrix included in the parity check matrix and associated with the first sub-codeword; and decoding a second sub-codeword into second data by using second sliding windows in a second direction, set based on a second sub-matrix included in the parity check matrix and associated with the second sub-codeword.