Patent ID: 7518416
Filing Date: 2009-04-14
Classification: G01R,H02M

Abstract:
1. An apparatus for detecting a continuous current of a switching current, comprising: a switching control circuit, for generating a switching signal to switch a magnetic device; a current sense circuit, for generating a current signal in response to a switching current of the magnetic device; a signal generation circuit, for generating a first sample signal and a second sample signal; and a detection circuit, coupled to the current signal to generate a first current signal and a second current signal in response to the first sample signal and the second sample signal respectively, wherein the detection circuit generates a continuous current signal according to the first current signal and the second current signal, and wherein the continuous current signal is corrected to the continuous current of the switching current, wherein a pulse width of the second sample signal is longer than a pulse width of the first sample signal, wherein the first sample signal and the second sample signal are generated in response to an enabling of the switching signal.