Refresh period generating circuit

Details Refresh period generating circuit Refresh period generating circuit

2007-07-24

2007-07-24

Ho, Hoai V. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S211000, C365S233100

Reexamination Certificate

active

11180552

ABSTRACT:
A refresh period generating circuit which generates a refresh period in refreshing a DRAM cell, comprising: an oscillation circuit which oscillates at a frequency with temperature dependence on ambient temperature; a dividing circuit which divides an oscillation output of the oscillation circuit; a temperature detector which detects the ambient temperature; and a selector which switches and selects among division outputs with respective frequencies from the dividing circuit based on an output of the temperature detector, and outputs a signal as a reference of the refresh period. The temperature dependence in the oscillation circuit includes a positive temperature coefficient in a predetermined temperature range, and does not include a positive temperature coefficient out of the predetermined temperature range. The selector switches the division outputs out of the predetermined temperature range.

REFERENCES:
patent: 5752011 (1998-05-01), Thomas et al.
patent: 2005/0146964 (2005-07-01), Sako
patent: 05-307882 (1993-11-01), None
patent: 2002-215258 (2002-07-01), None

Affiliated with

Also associated with

Rating

Refresh period generating circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3776867