Circuit and method for reading and writing data in a memory devi

Details Circuit and method for reading and writing data in a memory devi Circuit and method for reading and writing data in a memory devi

1999-01-21

2000-02-01

Nguyen, Viet Q.

Static information storage and retrieval

Read/write circuit

36518905, 365190, 36523006, 365202, G11C 700

Patent

active

060210702

ABSTRACT:
A memory device. The memory device includes an array of memory cells that are coupled to a number of word lines and a number of digit lines. The memory device further includes an addressing circuit that is coupled to the array. The addressing circuit selects a memory cell based on a received address signal. An input/output device is coupled to the digit lines of the array. The input/output device includes an input for receiving a control signal. A control circuit is coupled to the input of the input/output device. The control circuit produces a control signal with a first voltage level when reading data from the array and produces a control signal with a second voltage level when writing data to the array. Thus, the control signal causes the input/output device to provide acceptable drive current during a read operation such that the input/output device does not disturb the data on the digit lines. Further, the control signal provides sufficient drive current during a write operation to allow the data on input/output lines to be passed to the digit lines.

REFERENCES:
patent: 5274276 (1993-12-01), Casper et al.
patent: 5331593 (1994-07-01), Merritt et al.
patent: 5491655 (1996-02-01), Hirose et al.
patent: 5535167 (1996-07-01), Hazami
patent: 5555215 (1996-09-01), Nakagome et al.
patent: 5644548 (1997-07-01), Kitsukawa et al.

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