Patent ID: 8461797

Claim:
A current direction detection module, comprising: a conversion unit having a primary side and a secondary side, wherein the secondary side has a first end and a second end; a bridge unit having a first rectifying element, a second rectifying element, a third rectifying element, a fourth rectifying element, a first node, a second node, a third node and a fourth node, wherein each of the first, second, third and fourth rectifying elements has an anode and a cathode, the anode of the first rectifying element is electrically coupled to the cathode of the fourth rectifying element to form the first node, the anode of the second rectifying element is electrically coupled to the cathode of the first rectifying element to form the third node, the anode of the third rectifying element is electrically coupled to the cathode of the second rectifying element to form the second node, the anode of the fourth rectifying element is electrically coupled to the cathode of the third rectifying element to form the fourth node, and the first and second nodes are electrically coupled to the first and second ends of the conversion unit, respectively; and an operation unit electrically coupled to the third and fourth nodes of the bridge unit, and amplifying two bridge voltages at the third and fourth nodes in a differential manner to output an operation voltage.