Method and circuit for controlling a refresh of a...

Details Method and circuit for controlling a refresh of a... Method and circuit for controlling a refresh of a...

2008-01-01

2008-01-01

Mis, David (Department: 2817)

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

C331S057000, C331S186000

Reexamination Certificate

active

07315221

ABSTRACT:
A refresh control circuit includes a reference voltage generating circuit and an oscillator unit. The reference voltage generating circuit generates a reference voltage based on a variation in a drain-to-source voltage of a field effect transistor according to a temperature variation. The oscillator unit generates a pulse signal having a period that varies according to the temperature based on the reference voltage. The refresh period is thereby controlled automatically, in accordance with the operating temperature.

REFERENCES:
patent: 5600281 (1997-02-01), Mori et al.
patent: 6597614 (2003-07-01), Nam et al.
patent: 6946896 (2005-09-01), Behzad
patent: 07-141865 (1995-06-01), None
patent: 1999-19949 (1999-06-01), None
patent: 10-2002-0002659 (2002-01-01), None

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