Power source detector

Details Power source detector Power source detector

2005-08-16

2005-08-16

Nguyen, Van Thu (Department: 2824)

Static information storage and retrieval

Powering

C327S143000

Reexamination Certificate

active

06930947

ABSTRACT:
A power source detecting circuit of a Dynamic Random Access Memory (DRAM) and an operating method thereof comprise a first power source detector to operate at a good power level, and a second power source detector to operate at an appropriate data power level. The first power source detector receives a first external power, and outputs a signal to indicate whether the first external power is ready for the DRAM to function properly. The second power source detector receives a second external power, and provides a first output state to indicate that the DRAM data power is at a first data power level and a second output state to indicate that the DRAM data power is at a second data power level. After the DRAM receives the data power level indication from the second power source detector, the DRAM automatically configures itself to operate at the corresponding data power level.

REFERENCES:
patent: 5424994 (1995-06-01), Nagasawa
patent: 5874853 (1999-02-01), Yamaguchi et al.
patent: 5936443 (1999-08-01), Yasuda et al.
patent: 6160431 (2000-12-01), Crotty
patent: 6215725 (2001-04-01), Komatsu
patent: 6768354 (2004-07-01), Yamazaki et al.

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