Patent ID: 7619397
Filing Date: 2009-11-17
Classification: G05F,Y10S

Abstract:
1. A system for providing a soft-start to a power regulator, the system comprising: a differential transistor pair configured to receive an input current and to conduct a first current through a first transistor and a second current through a second transistor, such that one of the first current and the second current changes in response to a change in the other of the first current and the second current to maintain that a sum of the first current and the second current is substantially equal to the input current; a comparator configured to provide an output signal based on a comparison of a first input voltage and a second input voltage that are associated with the first current and the second current, respectively; and a current source that is activated by the output signal to charge a capacitor that increases a soft-start reference voltage associated with control of the power regulator, the soft-start reference voltage also controlling the change in the other of the first current and the second current.