Boosting charge pump circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

Reexamination Certificate

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Details

C327S537000

Reexamination Certificate

active

07663428

ABSTRACT:
In order to resolve a problem of the conventional technique in which there is a charge pump capacitance which is not used when a boosting method of the charge pump is changed, in a charge pump circuit unit, a connection switching terminal selects a power source voltage, a logically-inverting buffer gate and a capacitor to conduct an operation of boosting the power source voltage so as to be twice the power source voltage, and a connection switching terminal outputs the boosted voltage as a boost control voltage. In a charge pump circuit unit, a connection switching terminal selects the boost control voltage outputted from the charge pump circuit unit, and a logically-inverting buffer gate and a capacitor conduct an operation of boosting the inputted voltage so as to be 3×VDD. An internal voltage is generated by outputting the boosted voltage to an internal power line via a NMOS transistor.

REFERENCES:
patent: 6714065 (2004-03-01), Komiya et al.
patent: 6960955 (2005-11-01), Nonaka
patent: 7319626 (2008-01-01), Cheon
patent: 7439794 (2008-10-01), Takeyama et al.
patent: 2002-112532 (2002-04-01), None
patent: 2005-235315 (2005-09-01), None

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