发明名称 Optimized threshold search in analog memory cells using separator pages of the same type as read pages
摘要 A method includes reading a group of analog memory cells using first explicit read thresholds, to produce first readout results. The group is re-read using second explicit read thresholds, to produce second readout results. The group is read using one or more sets of auxiliary thresholds so as to produce auxiliary readout results, such that the number of the auxiliary thresholds in each set is the same as the number of the first explicit read thresholds and the same as the number of the second explicit read thresholds. A readout performance of third read thresholds, which include at least one of the first explicit read thresholds and at least one of the second explicit read thresholds, is evaluated using the first, second and auxiliary readout results.
申请公布号 US8830746(B2) 申请公布日期 2014.09.09
申请号 US201313905580 申请日期 2013.05.30
申请人 Apple Inc. 发明人 Barkon Maya;Dalal Meir;Teitel Moti;Anholt Micha
分类号 G11C11/34;G11C16/34;G11C27/00;G11C29/02;G11C11/56 主分类号 G11C11/34
代理机构 Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C. 代理人 Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
主权项 1. A method, comprising: reading a group of analog memory cells using first explicit read thresholds, to produce first readout results; re-reading the group using second explicit read thresholds, to produce second readout results; reading the group using one or more sets of auxiliary thresholds so as to produce auxiliary readout results, such that the number of the auxiliary thresholds in each set is the same as the number of the first explicit read thresholds and the same as the number of the second explicit read thresholds; and evaluating a readout performance of third read thresholds, which comprise at least one of the first explicit read thresholds and at least one of the second explicit read thresholds, using the first, second and auxiliary readout results.
地址 Cupertino CA US