Semiconductor memory devices

Details Semiconductor memory devices Semiconductor memory devices

1996-11-01

1997-11-18

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Precharge

36523006, 365149, G11C 700

Patent

active

056894694

ABSTRACT:
Precharge circuits precharge plural pairs of bit lines to a specified potential when no word line is selected (during standby). Pull-down transistors are turned ON when the corresponding word lines are not selected so as to connect the corresponding word lines to a common power source line, which is connected to the ground. In a path connecting the above common power source line to the ground is disposed an impedance changing means for changing the impedance of the path between a value during standby and another value during operation during which any word line is selected so that the value during standby is set higher than the value during operation. Consequently, during standby, a leakage current (standby current) resulting from a short circuit between a bit line and a word line is reduced.

REFERENCES:
patent: 5373479 (1994-12-01), Noda
patent: 5504715 (1996-04-01), Lee et al.

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