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    • 8. 发明授权
    • Method of estimating read level for a memory device, memory controller therefor, and recording medium
    • 用于估计存储器件,其存储器控制器和记录介质的读取电平的方法
    • US08516183B2
    • 2013-08-20
    • US13114337
    • 2011-05-24
    • Hee Seok EunHong Rak SonJong Ha KimYoung June KimSeong Hyeog Choi
    • Hee Seok EunHong Rak SonJong Ha KimYoung June KimSeong Hyeog Choi
    • G06F12/00
    • G11C11/5642G06F12/0246G06F2212/7209G11C16/3404G11C16/349
    • A method of estimating a read level for a memory device includes calculating first information corresponding to at least one among information about the number of cells having a particular logic level in data to be programmed and information about the number of cells having a particular cell state and storing the first information during a program operation; reading the data based on a threshold level that has been set and calculating second information about the number of cells in at least one state defined by the threshold level with respect to the read data; calculating third information about the number of cells in the at least one state, which corresponds to the second information, using a probability based on the first information; comparing the second information with the third information; and determining whether to change the threshold level according to the comparison result.
    • 一种估计存储器件的读取电平的方法包括:计算对应于关于要编程的数据中具有特定逻辑电平的单元的数量的信息中的至少一个的信息的第一信息以及关于具有特定单元状态的单元的数量的信息,以及 在程序操作期间存储第一信息; 基于已经设置的阈值水平读取数据,并且相对于读取的数据计算关于由阈值水平定义的至少一个状态中的单元数量的第二信息; 使用基于所述第一信息的概率来计算与所述第二信息对应的所述至少一个状态下的小区的数量的第三信息; 将第二信息与第三信息进行比较; 以及根据比较结果确定是否改变阈值水平。