Invention Grant
- Patent Title: Memory device with source-side sensing
- Patent Title (中): 具有源侧感测的存储器件
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Application No.: US13769398Application Date: 2013-02-18
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Publication No.: US08760930B1Publication Date: 2014-06-24
- Inventor: Alexander Kushnarenko , Yoram Betser
- Applicant: (Spansion Inc.) Spansion LLC.
- Applicant Address: US CA Sunnyvale
- Assignee: Spansion LLC.
- Current Assignee: Spansion LLC.
- Current Assignee Address: US CA Sunnyvale
- Agency: Eitan, Mehulal & Sadot
- Main IPC: G11C16/06
- IPC: G11C16/06

Abstract:
A source-sensing configuration for non-volatile memory devices to simultaneously read 2 bits in two different memory cells sharing a same word line is disclosed. In a first cell arrangement, a drain of a first read cell is biased and its source and that of two adjacent cells in a direction towards the second read cell are connected through source bit lines to a source sense amplifier. In a second cell arrangement, the drain of the second read cell is biased and its source and that of its two adjacent cells in a direction towards the first read cell are connected through source bit lines to a source sense amplifier. A memory cell acts as a cell pipe and joins together the first and second cell arrangements. Driving all six source bit lines simultaneously allows the 2 bits to be simultaneously read while maintaining currents due to pipe effect substantially minimized.
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