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Offset‐cancelling current‐mode sense amplifier for fast‐read eFlash memory
Author(s) -
Zhu Wenyi,
Jiang Jianwei,
Zhang Haineng,
Xiao Jun,
Yang Guangjun,
Zou Shichang
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.0061
Subject(s) - sense amplifier , offset (computer science) , amplifier , sense (electronics) , computer science , electronic engineering , electrical engineering , input offset voltage , operational amplifier , telecommunications , engineering , bandwidth (computing) , semiconductor memory , programming language
A novel offset‐cancelling current‐mode sense amplifier (OC‐CSA) to improve the sensing speed of embedded flash (eFlash) memory is proposed. To reduce the precharge time related to random address transitions, this OC‐CSA adopts a new precharge acceleration scheme. Moreover, by employing offset cancellation, double sensing margin and strong positive feedback techniques, the new OC‐CSA can achieve a sensing speed 1.6 × faster than other OC‐CSAs. A 130 nm 1 Mb eFlash macro to confirm the high‐speed capability of the proposed OC‐CSA is fabricated. The experiment results show the new OC‐CSA can achieve a read access time of 11 ns at VDD = 1.3 V.

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