Internal voltage generator of semiconductor memory device

Details Internal voltage generator of semiconductor memory device Internal voltage generator of semiconductor memory device

2007-12-28

2009-10-20

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S534000

Reexamination Certificate

active

07605639

ABSTRACT:
An internal voltage generator is capable of supplying a stable internal voltage regardless of an unstable external voltage. The internal voltage includes a first level detecting unit configured to detect a voltage level of the internal voltage and output an output power detecting signal, an oscillating unit configured to produce a periodical signal in response to the output power detecting signal, a second level detecting unit configured to detect a voltage level of an external voltage and output a driving power detecting signal, a dividing unit configured to selectively divide the periodical signal in response to the driving power detecting signal and output a divided signal, and a charge pumping unit configured to provide the internal voltage by pumping the external voltage in response to the divided signal.

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Foreign Office Action issued from Korean Intellectual Property Office on May 27, 2008 with an English translation.

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