Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2008-01-29
2008-01-29
Vu, Bao Q. (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S901000, C323S314000, C323S909000
Reexamination Certificate
active
07323856
ABSTRACT:
A power efficient startup circuit for activating a bandgap reference circuit is disclosed. The startup circuit uses a voltage supply having a voltage level to initiate the flow of a startup current used to activate the bandgap reference circuit. When the bandgap reference circuit starts, the startup circuit slowly charges a capacitor using the voltage supply when the startup current is flowing. The startup circuit disables quiescent current when the bandgap reference circuit is activated and a voltage of the capacitor exceeds a value equal to the difference between the voltage of the voltage supply when powered on and a voltage threshold of a switching device which disables the quiescent current. The capacitor is discharged when the voltage supply is turned off.
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Manai Bilal
Pierrel Maud
Rabeyrin Xavier
Atmel Corporation
Volpe and Koenig P.C.
Vu Bao Q.
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