Invention Grant
- Patent Title: Dual port memory with write assist
- Patent Title (中): 双端口存储器,具有写入辅助功能
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Application No.: US12790632Application Date: 2010-05-28
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Publication No.: US08295099B1Publication Date: 2012-10-23
- Inventor: Santosh Yachareni , Subodh Kumar , Hsiao Chen
- Applicant: Santosh Yachareni , Subodh Kumar , Hsiao Chen
- Applicant Address: US CA San Jose
- Assignee: Xilinx, Inc.
- Current Assignee: Xilinx, Inc.
- Current Assignee Address: US CA San Jose
- Agent Scott Hewett; Gerald Chan
- Main IPC: G11C7/10
- IPC: G11C7/10 ; G11C8/00

Abstract:
A data value is read from one port of a dual-port memory cell during a clock cycle. A WRITE assist pulse having a delay from an end-of-read signal is generated. The delay and duration of the WRITE assist pulse are optionally user-selectable. A high voltage (e.g., Vdd) is coupled to the bitlines (e.g., BL-A, BLc-A) of the first port during the WRITE assist pulse, and a low voltage value (e.g., zero) is written to the memory cell through the second port (e.g., BL-B, BLc-B) during the clock cycle.
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