Internal voltage generator

Details Internal voltage generator Internal voltage generator

2007-12-28

2010-02-02

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

Reexamination Certificate

active

07656222

ABSTRACT:
An apparatus for generating an internal voltage includes an output-voltage detecting unit for detecting a voltage level of an internal voltage, an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit, a first driving-voltage level detecting unit for detecting an increase of a voltage level of a driving voltage, a second driving-voltage level detecting unit for detecting a decrease of a voltage level of the driving voltage, a period control unit for controlling a period of the periodic signal in response to output signals of the first and second driving-voltage level detecting units, and a charge pumping unit for generating the internal voltage by charge-pumping the driving voltage in response to an output signal from the period control unit.

REFERENCES:
patent: 6836176 (2004-12-01), Zeng et al.
patent: 7253676 (2007-08-01), Fukuda et al.
patent: 7482856 (2009-01-01), Lee
patent: 1996-0000837 (1996-01-01), None
patent: 10-0858875 (2007-04-01), None
patent: 20070037938 (2007-04-01), None
patent: 10-0858875 (2008-09-01), None

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