Multiple dummy cell layout for MOS random access memory

Static information storage and retrieval – Read/write circuit – Differential sensing

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365149, 365205, G11C 700

Patent

active

041986970

ABSTRACT:
A random access memory device of the MOS integrated circuit type employs an array of rows and columns of one-transistor storage cells with bistable sense amplifier circuits at the center of each column. A plurality of dummy cells are connected to each column line half instead of a single dummy cell, and one of the dummy cells is addressed when a memory cell on the opposite side of the sense amplifier is addressed by one of the row lines. Time delay is made more equal by spacing the dummy cells along each column line half, and addressing a dummy cell which is spaced about the same distance from the sense amplifier as the selected memory cell on the other side.

REFERENCES:
patent: 4038646 (1977-07-01), Mehta et al.
patent: 4050061 (1977-09-01), Kitagawa
patent: 4117545 (1978-09-01), Inadachi
patent: 4118794 (1978-10-01), Mizuno et al.

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