Semiconductor memory device having dual ports

Details Semiconductor memory device having dual ports Semiconductor memory device having dual ports

1991-11-18

1993-10-12

LaRoche, Eugene R.

Static information storage and retrieval

Read/write circuit

Simultaneous operations

36523005, 3652335, G11C 700

Patent

active

052532070

ABSTRACT:
A semiconductor memory device in which dual ports are provided for selecting a specific memory cell from a memory cell matrix includes a driving state detection unit for detecting the state of driving word lines of the two ports and delivering a detection signal based on the detection, where one of the ports is in the writing state with regard to the memory cell, and a bit line short-circuiting unit responsive to the detection signal from the driving state detection unit for realizing a short-circuit between predetermined bit lines.

REFERENCES:
patent: 4586168 (1986-04-01), Adlhoch et al.
patent: 4660177 (1987-04-01), O'Connor
patent: 4918664 (1990-04-01), Platt
patent: 4933909 (1990-06-01), Cushing et al.
patent: 5001671 (1991-03-01), Voo et al.
patent: 5007022 (1991-04-01), Leigh

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