Control circuit for refresh oscillator

Details Control circuit for refresh oscillator Control circuit for refresh oscillator

2007-08-28

2007-08-28

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C331S057000, C365S222000, C365S225700, C324S763010

Reexamination Certificate

active

11158344

ABSTRACT:
The present invention relates to a circuit for controlling a refresh oscillator, and more specifically, to a circuit for controlling a refresh oscillator, wherein refresh characteristics can be tested in a more efficient manner in such a manner that the refresh characteristics are tested at a refresh cycle, which is extended as long as a predetermined time from an originally set refresh cycle, in a user test mode so as to measure a refresh margin over a wide temperature range.

REFERENCES:
patent: 5862094 (1999-01-01), Kawabata et al.
patent: 6711082 (2004-03-01), Loffler
patent: 11-039862 (1999-02-01), None
patent: 2004-206855 (2004-07-01), None
patent: 2005-342862 (2005-12-01), None
patent: 1020000066536 (2000-11-01), None

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