Zero-current start-up circuit

Details Zero-current start-up circuit Zero-current start-up circuit

1996-11-25

1998-04-21

Wong, Peter S.

Electricity: power supply or regulation systems

Starting circuits

323313, 363 49, G05F 162, G05F 316, H02M 112

Patent

active

057421552

ABSTRACT:
A zero-current start-up circuit for a reference circuit which is initially unbiased and which has internal nodes that needs to be regulated to a predetermined voltage. When the start-up circuit is enabled, a switching transistor is turned on which enables the reference circuit to generate an internal reference current which regulates an output current to a predetermined value set by the reference circuit. The output current flows through a voltage drop device and when the voltage level reaches a predetermined value, the start-up circuit is disabled eliminating the current path.

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patent: 5532576 (1996-07-01), MacRobbie et al.
patent: 5631548 (1997-05-01), Susak
patent: 5640083 (1997-06-01), Alexis

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