Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-06-14
2005-06-14
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S537000
Reexamination Certificate
active
06906575
ABSTRACT:
A semiconductor integrated circuit device having an internal voltage generating circuit which generates a voltage two or more times higher than an operating voltage while at the same time reducing the voltage applied to a device, thereby ensuring the device reliability. In a charge pump circuit driven by supply voltage VDD, a maximum of 2 VDD or a similar level voltage is applied between the drain and source of a MOSFET, the MOSFET being connected in series with a conduction MOSFET of the same type, the gate of which is supplied with VD−VDD, or a potential which is VDD lower than VD, the drain potential before its connection. The gate potential is obtained directly from a node in said charge pump which generates a voltage pulse synchronized with the voltage between the drain and source of that MOSFET, or through another rectifier device branched via a capacitor from the node.
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Antonelli Terry Stout & Kraus LLP
Cunningham Terry D.
Hitachi ULSI Systems Co. Ltd.
Renesas Technology Corp.
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