The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2021
Filed:
Mar. 31, 2020
Silicon Motion, Inc., Jhubei, TW;
Shiuan-Hao Kuo, New Taipei, TW;
SILICON MOTION, INC., Jhubei, TW;
Abstract
A memory controller for use in a data storage device is provided. A low-density parity check (LDPC) process performed by the memory controller includes an initial phase, a decoding phase, and an output phase. The memory controller includes a variable-node circuit and a check-node circuit. During each LDPC decoding iterative operation in the decoding phase: the check-node circuit obtains a codeword difference from the variable-node circuit, and calculates a syndrome according to the codeword difference. The variable-node circuit is configured to: determine a syndrome weight according to the syndrome from the check-node circuit; obtain a previous codeword from a variable-node memory without obtaining a channel value from a channel-value memory; perform bit-flipping on one or more codeword bits in the previous codeword according to the calculated syndrome weight to generate an updated codeword; and subtract the previous codeword from the updated codeword to obtain the codeword difference.