Static information storage and retrieval – Read/write circuit – Data refresh
Reexamination Certificate
2006-12-05
2006-12-05
Nguyen, Tuan T. (Department: 2824)
Static information storage and retrieval
Read/write circuit
Data refresh
C365S189060, C365S189070, C365S193000, C365S211000
Reexamination Certificate
active
07145826
ABSTRACT:
A device for controlling a temperature compensated self-refresh period clamps a self-refresh signal at high temperature over a specific temperature to maintain the self-refresh period, thereby removing dependency on temperature. In the device, an oscillating signal having a period varied depending on temperature change is generated below a specific temperature, and a period of a first period signal is compared with that of the oscillating signal applied from a temperature compensated self-refresh circuit unit over the specific temperature. When the period of the oscillating signal is shorter than that of the first signal, a pulse width of an oscillating strobe signal generated in response to a plurality of division signals each obtained by dividing the period of the oscillating signal at a predetermined ratio is controlled, so that an oscillating period of the temperature compensated self-refresh circuit unit is kept at a fixed state.
REFERENCES:
patent: 5654930 (1997-08-01), Yoo et al.
patent: 6868026 (2005-03-01), Fujioka
Han Bong Seok
Hong Yun Seok
Heller Ehrman LLP
Hynix / Semiconductor Inc.
Nguyen N
Nguyen Tuan T.
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