Semiconductor memory device allowing selection of the number of

Details Semiconductor memory device allowing selection of the number of Semiconductor memory device allowing selection of the number of

1995-02-15

1996-08-06

Yoo, Do Hyun

Static information storage and retrieval

Read/write circuit

Differential sensing

365194, 365233, G11C 700

Patent

active

055441157

ABSTRACT:
An improved DRAM is disclosed, in which a number of sense amplifiers to be activated simultaneously can be selected by using a bonding option method. An output signal /.phi..sub.A supplied from a bonding option circuit 11 is applied to column interlock releasing circuit 7. When an operation mode in which the number of the sense amplifiers to be activated simultaneously is large is selected, a column interlock releasing signal /.phi. is delayed, and enabling of a column decoder 3 is delayed. In the operation mode, in which the number of the sense amplifiers to be activated simultaneously is large, the enabling of the column decoder 3 is delayed, and a conducting timing of an IO gate circuit 16 is delayed. A sense amplifier 15 can sufficiently amplify a potential difference between bit lines, so that an error in the data reading operation is prevented.

REFERENCES:
patent: 4996671 (1991-02-01), Suzuki et al.
patent: 5053997 (1991-10-01), Miyamoto et al.
patent: 5065365 (1991-11-01), Hirayama
patent: 5132932 (1992-07-01), Tobita

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