High voltage generator and semiconductor memory device

Details High voltage generator and semiconductor memory device High voltage generator and semiconductor memory device

2006-09-28

2009-08-11

Luu, Pho M. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S189060, C365S230030, C365S233500

Reexamination Certificate

active

07573771

ABSTRACT:
A high voltage generator includes: a high voltage detecting unit for detecting a level of a high voltage and outputting a high enable signal; an auto refresh control unit for enabling an auto refresh high enable signal in response to a detection signal enabled when a level of a power supplying voltage is lower than a certain level and in response to the pumping enable signal during an auto refresh operation; and a high voltage generating unit for generating a high voltage by performing a pumping operation in response to the auto refresh pumping enable signal.

REFERENCES:
patent: 5995435 (1999-11-01), Hamamoto et al.
patent: 6141279 (2000-10-01), Hur et al.
patent: 7042774 (2006-05-01), Kim
patent: 7123079 (2006-10-01), Do
patent: 2005/0169088 (2005-08-01), Brox
patent: 11-086554 (1999-03-01), None
patent: 10-2005-0049631 (2005-05-01), None
Korean Office Action issued in Korean Patent Application No. 2006-0029651, dated Mar. 31, 2007.

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