Multi-port semiconductor memory

Details Multi-port semiconductor memory Multi-port semiconductor memory

1990-09-20

1992-06-23

Popek, Joseph A.

Static information storage and retrieval

Addressing

Multiple port access

36523001, 365208, G11C 800

Patent

active

051249502

ABSTRACT:
A multi-port semiconductor memory includes a memory cell array having a plurality of memory cells (10), a plurality of columns and rows, a write/read system, and at least one read system having sense amplifiers, each of the columns having a pair of data lines. Each of the sense amplifiers has first and second terminals connected to the pair of data lines and senses a voltage difference between the first and second terminals. The multi-port semiconductor memory also includes an address coincidence detection circuit which generates a control signal when a first address provided for writing write data into the memory cell array by the write/read system coincides with a second address provided for reading the write data by the read system. Further, the multi-port semiconductor memory includes a read control circuit which is provided in each of the sense amplifiers and which connects the first and second terminals of a corresponding one of the sense amplifies to the pair of data lines when the address coincidence detection circuit generates no control signal and which sets one of the first and second terminals to a predetermined voltage on the basis of the content of the write data while the other one of the first and second terminals is connected to a corresponding one of the pair of data lines.

REFERENCES:
patent: 4586168 (1986-04-01), Adlhoch et al.
patent: 4984204 (1991-01-01), Sato et al.

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