Semiconductor memory device with flash-clear function

Details Semiconductor memory device with flash-clear function Semiconductor memory device with flash-clear function

1992-10-13

1995-01-17

Popek, Joseph A.

Static information storage and retrieval

Systems using particular element

Flip-flop

365 63, 365179, G11C 1140

Patent

active

053831535

ABSTRACT:
A semiconductor memory device equipped with a flash-clear function has a plurality of flip-flop type memory cells each of which is formed by a first multi-emitter transistor and a second multi-emitter transistor, a clear line and a switching circuit. Each of the memory cells is connected between a word top line and a word bottom line. The second multi-emitter transistor has emitter nodes the number of which is smaller than that of emitter nodes of the first multi-emitter transistor. Some of the emitter nodes of the first multi-emitter transistor are connected to the clear line. Through the switching circuit, a current source is selectively connected to the word bottom line and the clear line. Since the first multi-emitter transistor is controlled by the clear line, the content of the same data can easily be written into a plurality of memory cells without such memory cells being caused to change their characteristics.

REFERENCES:
patent: 3634833 (1972-01-01), Dunn et al.
patent: 3686515 (1972-08-01), Kadono
patent: 3764825 (1973-10-01), Stewart
patent: 4035784 (1977-07-01), Brown

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