Patent ID: 6552562
Filing Date: 2003-04-22
Classification: G01R,H02J,H02M

Abstract:
A current detecting apparatus comprising:a first resistor provided between an input terminal and an output terminal; first switching means provided in parallel with said first resistor; control means for controlling said switching means; first detecting means for detecting a current flowing in said first resistor or a potential difference which is caused in said first resistor; a second resistor provided so as to be serial to at least said first switching means; and second detecting means for detecting a current flowing in said second resistor or a potential difference which is caused in said second resistor, wherein said control means turns off said switching means when the current or potential difference that is equal to or larger than a first predetermined value is detected by said first detecting means and turns on said switching means when the current or potential difference that is equal to or smaller than a second predetermined value is detected by said second detecting means, and said first and second detecting means output the detected current or potential difference.