Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-03-21
1997-05-13
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327535, 327538, G05F 110
Patent
active
056296460
ABSTRACT:
In a DRAM unit in which the substrate bias voltage is maintained within predetermined limits by a of voltage detectors and a charge pump, a third voltage detector is provided which detects a intermediate substrate bias voltage level that is within the voltage range identified by the pair of voltage detectors. When the third voltage level detects that the intermediate substrate bias voltage has been traversed, the charge pump is activated at a reduced level to drive the substrate bias voltage to recross the intermediate substrate bias voltage level. This technique permits the DRAM unit to operate in a stand-by mode at a lower power level, especially in a standby mode of operation, than when the substrate bias voltage is maintained only by the two voltage limit detectors and a single power level charge pump.
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Kengeri Subramani
Madhu Raghava
Menezes Vinod J.
Callahan Timothy P.
Donaldson Richard L.
Holland Robby T.
Holloway William W.
Kim Jung Ho
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