CMOS reference voltage generator

Details CMOS reference voltage generator CMOS reference voltage generator

1998-04-28

1999-10-05

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327530, 365229, G05F 110

Patent

active

059630833

ABSTRACT:
A CMOS voltage generator for providing a reference voltage VDD2 that will track the low level power supply voltage VDD (approximately 3.0V-3.6V) as long as the power supply is present. When VDD is not present (defined as at "hot pluggable" condition), the voltage generator is configured to maintain a "protection" output voltage less than the relatively high voltage (approximately 5V) that may appear along a circuit signal bus. In particular, the circuit includes at least a pair of diode-connected N-channel devices disposed between the signal bus line and the output voltage terminal to provide the necessary protection.

REFERENCES:
patent: 5532676 (1996-07-01), Moore, III
patent: 5592121 (1997-01-01), Jung et al.
patent: 5694075 (1997-12-01), Bingham
patent: 5898618 (1999-04-01), Bakkapragada et al.

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