Semiconductor memory

Details Semiconductor memory Semiconductor memory

1989-04-18

1991-06-25

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Data refresh

G11C 11406

Patent

active

050273272

ABSTRACT:
A semiconductor memory having dynamic memory cells includes a determining circuit for determining whether or not it is necessary to refresh the dynamic memory cells, and only when it is necessary, outputting a refresh execution signal in response to a refresh request signal from an external circuit, and a circuit for executing a refresh operation in response to the refresh execution signal. Even if the refresh request signal is supplied, a refresh operation is not executed unless the determining circuit determines that the refresh operation is necessary, thus dispensing with unnecessary refresh operations. Preferably, the determining circuit includes a timer which outputs a signal at every predetermined period. Only when the signal is output from the timer, is the refresh request signal from an external circuit accepted and the refresh execution signal output.

REFERENCES:
patent: 4625301 (1986-11-01), Berger
patent: 4672583 (1987-06-01), Nakaizumi
Toshi Corporation, "MOS Memory Products" Data Book, Jan. 1988, pp. 307-317.

Affiliated with

Also associated with

Rating

Semiconductor memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1045789