Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2005-01-11
2005-01-11
Pert, Evan (Department: 2829)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
Reexamination Certificate
active
06842321
ABSTRACT:
The UVLO (undervoltage lockout) circuit provides a very low quiescent current that is independent of supply voltage. The circuit includes a low voltage IPTAT (current proportional to absolute temperature) generator coupled to a comparator24wherein a first input of the comparator24is coupled to the IPTAT generator in a way that forms a bandgap voltage with respect to ground and a second input of the comparator24is coupled to the IPTAT generator in a way that forms a bandgap voltage with respect to a supply node. This makes the quiescent current independent of the supply voltage because there is no voltage divider between the supply node and ground.
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Stephen G. Eick,Visualizing Online Activity, Communications of the ACM, Aug. 2001, vol. 44, No 8, pp. 45-50.
Brady III W. James
Pert Evan
Stewart Alan K.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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