Adaptive current reversal comparator

Details Adaptive current reversal comparator Adaptive current reversal comparator

2007-10-09

2007-10-09

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S225000, C323S285000, C363S127000

Reexamination Certificate

active

11408749

ABSTRACT:
An adaptive current reversal comparator for synchronous switching regulator comparison circuit for use in a switching regulator is provided. The comparison circuit includes a voltage offset that is used at least in part to compensate for a propagation delay of the comparison circuit. The switching regulator includes an inductor and a synchronous transistor. The comparison circuit also includes a timing circuit that provides a threshold amount of time and an offset adjustment circuit. The offset adjustment circuit preferably decreases the voltage offset of the comparison circuit when a synchronous transistor control signal transitions to an OFF state more than the threshold amount of time prior to the discharge of an inductor. The comparison circuit also increases the voltage offset of the comparison circuit when the synchronous control signal transitions to an OFF state more than the threshold amount of time following the discharge of the inductor.

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