Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2006-08-29

2006-08-29

Phung, Anh (Department: 2824)

Static information storage and retrieval

Powering

C365S189090

Reexamination Certificate

active

07099223

ABSTRACT:
The present invention is related to an internal voltage generator for use in a semiconductor memory device preventing latch-up and chip damage. The internal voltage generator includes a first pumping block for comparing an internal upper voltage with a reference voltage to generate a first compensated upper voltage based on a comparison result, an initial level sensor for comparing the internal upper voltage with an operating voltage to thereby generate a first enable signal, a second pumping block for generating a second compensated upper voltage in response to an active command, the first enable signal, and the comparison result of the first pumping block, and an initializing block for providing the internal voltage during an initial operation of the semiconductor memory device.

REFERENCES:
patent: 6370075 (2002-04-01), Haeberli et al.
patent: 6414881 (2002-07-01), Fujii et al.
patent: 6472926 (2002-10-01), Taito et al.
patent: 2003/0151945 (2003-08-01), Tanzawa

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