Temperature compensated self-refresh circuit

Details Temperature compensated self-refresh circuit Temperature compensated self-refresh circuit

2005-06-09

2008-12-30

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

Reexamination Certificate

active

07471136

ABSTRACT:
A temperature compensated self-refresh circuit maintains a stable current characteristic by maintaining a predetermined self-refresh cycle to cope with a process skew and a voltage change in a low power consumption memory product and by changing the self-refresh cycle only depending on temperature change. The temperature compensated self-refresh circuit is provided with a reference voltage generating unit adapted and configured to use an internal power voltage of a Widlar type so as to reduce a process skew and to have NMOS transistors with a LVT (Low Voltage Transistor) structure so as to have the same voltage as that of a temperature sense unit, thereby maintaining a predetermined cycle of an oscillating signal coping with the process skew.

REFERENCES:
patent: 5852376 (1998-12-01), Kraus
patent: 6204724 (2001-03-01), Kobatake
patent: 6628558 (2003-09-01), Fiscus
patent: 7135913 (2006-11-01), Min et al.
patent: 2000075947 (2000-03-01), None

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