Invention Grant
US08345469B2 Static random access memory (SRAM) having bit cells accessible by separate read and write paths
有权
具有通过单独的读取和写入路径访问位单元的静态随机存取存储器(SRAM)
- Patent Title: Static random access memory (SRAM) having bit cells accessible by separate read and write paths
- Patent Title (中): 具有通过单独的读取和写入路径访问位单元的静态随机存取存储器(SRAM)
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Application No.: US12883275Application Date: 2010-09-16
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Publication No.: US08345469B2Publication Date: 2013-01-01
- Inventor: Perry H. Pelley , Ravindraraj Ramaraju
- Applicant: Perry H. Pelley , Ravindraraj Ramaraju
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agent Joanna G. Chiu; James L. Clingan, Jr.
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C7/00

Abstract:
A method is for reading a first bit cell of a static random access memory in which the static random access memory has a first plurality of bit cells including the first bit cell. Each bit cell of the first plurality of bit cells includes a cross coupled pair of inverters for storing a logic state, optimized for being written, and powered by a read voltage during a read of the first plurality of bit cells. Each bit cell of the first plurality of bit cells is coupled to a true read bit line and a true write bit line, and a second plurality of bit cells is coupled to a complementary read bit line and a complementary write bit line. The true and complementary read bit lines are precharged to a precharge voltage of about half the read voltage. The true read bit line is predisposed to a logic low condition. One of a group consisting of a high impedance from the first bit cell to indicate that the logic state is a logic low and a signal voltage greater than the intermediate voltage to indicate that the logic state is a logic high is output from the first bit cell to the true read bit line.
Public/Granted literature
- US20120069636A1 STATIC RANDOM ACCESS MEMORY (SRAM) HAVING BIT CELLS ACCESSIBLE BY SEPARATE READ AND WRITE PATHS Public/Granted day:2012-03-22
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