Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-03-22
2005-03-22
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
Reexamination Certificate
active
06870420
ABSTRACT:
An increased internal operating voltage for an integrated circuit can be generated with two two-stage charge pumps, ensuring reliable operation even in the event of an external voltage supply Vext=1.8 V or less. The two charge pumps cooperate with a common first stage in a cyclic sequence. A temporally offset organization of the cycles of the two charge pumps enables operation in a manner that is free from disturbances. Moreover, the large chip area required for capacitors can advantageously be considerably reduced.
REFERENCES:
patent: 6717458 (2004-04-01), Potanin
Hausmann Michael
Schnabel Joachim
Cunningham Terry D.
Greenberg Laurence A.
Infineon - Technologies AG
Locher Ralph E.
Stemer Werner H.
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