Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1999-10-29
2000-08-22
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327534, 327546, 307 66, 307 87, H03F 301
Patent
active
061078654
ABSTRACT:
A battery backed-up semiconductor device employs a Vss switching configuration to provide uninterrupted battery power to critical circuitry of the device even in the event of external conditions, such as undershoot, that threaten to corrupt data stored by the device. Both primary power and battery power, when needed, are supplied to floating wells of the device rather than to the device substrate, making the device immune to undershoots that can short the battery to the device substrate and corrupt data stored by the device. The device substrate is permanently tied to the positive power supply voltage and the positive terminal of the battery voltage and is therefore not subject to the concerns associated with switching from a failed primary power supply to the back-up battery power supply.
REFERENCES:
patent: 3676717 (1972-07-01), Lockwood
patent: 3761901 (1973-09-01), Aneshansley
patent: 4713555 (1987-12-01), Lee
patent: 4715016 (1987-12-01), Lamiaux et al.
patent: 4754160 (1988-06-01), Ely
patent: 4862610 (1989-09-01), Harrington, III
patent: 5181091 (1993-01-01), Harrington, III et al.
patent: 5682689 (1997-11-01), Williams et al.
Cunningham Terry D.
Galanthay Theodore E.
Jorgenson Lisa K.
Larson Renee M.
STMicroelectronics Inc.
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