Schmitt trigger based memory cell with assisted turn on

Details Schmitt trigger based memory cell with assisted turn on Schmitt trigger based memory cell with assisted turn on

1984-08-31

1986-10-28

Popek, Joseph A.

Static information storage and retrieval

Systems using particular element

Semiconductive

G11C 1134

Patent

active

046202978

ABSTRACT:
A Schmitt trigger memory cell includes a storage node (20) for storage of data thereon with a current limiter resistor (22) for sinking current therefrom to a source node. A driving transistor (24) supplies current to the storage node (20) from a supply node. The gate of the transistor (24) is supplied by a current limiter resistor (28) from the supply node to turn the transistor (24) on and source current to the storage node (20). A transistor (30) is connected between the gate of the transistor (24) and the storage node (20) for shunting current from the gate of the transistor (24) to the source thereof. The transistor (30) is turned on by pulling the storage node (20) to a low voltage. To turn the transistor (24) on, the voltage on the storage node (20) is pulled high. A transistor (34) supplies current from the supply node to the gate of a transistor (24) during turn on thereof when the storage node (20) is pulled high. The transistor (34) is conducting only during turn on and not in the static condition of the memory cell. A transistor (32) is connected between the storage node (20) and the Bit Line to allow addressing of the data on the storage node (20) and writing of data thereto.

REFERENCES:
patent: 3997881 (1976-12-01), Hoffmann

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