Single ended simpler dual port memory cell

Details Single ended simpler dual port memory cell Single ended simpler dual port memory cell

1997-01-30

1999-12-21

Zarabian, A.

Static information storage and retrieval

Systems using particular element

Flip-flop

36523005, G11C 1100

Patent

active

060057963

ABSTRACT:
A single ended simplex dual port memory cell is described. One port of the memory cell is dedicated for writing operations and the other port of the memory cell is dedicated for reading operations. A bit of data received from the first port can be stored in the memory cell. The second port can detect the memory cell contents substantially simultaneously as the memory cell is storing a bit of data from the first port. Each port is optimized for its respective dedicated operation. In other words, one port is optimized for write operations and the other port is optimized for read operations. Because one port of the memory cell is optimized for write operations and the other port of the memory cell is optimized for read operations, the cell does not require multiple wordline voltages for each port.

REFERENCES:
patent: 5289432 (1994-02-01), Dhong
patent: 5424995 (1995-06-01), Miyazaki
patent: 5428574 (1995-06-01), Kuo
patent: 5434818 (1995-07-01), Byers
Helmut Liedl and Kurt Marquardt, "Dual-Port RAM for Cost-attractive Multi-Microcontroller Systems", Siemans Components, vol. 25, No. 5, pp. 163-166 (Oct. 25, 1990).
Feipei Lai, Ying Lang Chuang and Shyh Jong Chen, "A New Design Methodology for Multiport SRAM Cell", IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, vol. 41, No. 11, pp. 677-685, (Nov. 1994).
Ukita, et al., "A Single-Bit-Line Cross-Point Cell Activation (SCPA) Architecture for Ultra-Low-Power SRAM's", IEEE Journal of Solid-State Circuits, vol. 28, No. 11, Nov. 1993, pp. 1114-1118.

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