Patent ID: 8000077

Claim:
A direct-current (DC) noise absorbing device for preventing surges and regulating voltages, which includes elements on or between two wires respectively of positive voltage and negative voltage, the DC noise absorbing device comprising: a surge inhibitor, disposed on the wire of positive voltage, the surge inhibitor having a hollow cylinder with the wire of positive voltage winding therethrough for a number of turns and subsequently penetrating to make a low inductance for inhibiting surges with extremely high frequencies so as to protect electronic components within the DC noise absorbing device; a plurality of diodes, the diodes being provided with different cut-in switching voltages, and connected in parallel and disposed between the wires of positive voltage and negative voltage so as to form a first staircase, reciprocally protective construction of cut-in switching voltages; a plurality of Zener diodes, the Zener diodes being provided with different cut-in switching voltages, and connected in parallel and disposed between the wires of positive voltage and negative voltage so as to form a second staircase, reciprocally protective construction of cut-in switching voltages; a plurality of diode alternate current switches (DIACs), the DIACs being provided with different cut-in switching voltages, and connected in parallel and disposed between the wires of positive voltage and negative voltage so as to form a third staircase, reciprocally protective construction of cut-in switching voltages; and a plurality of capacitors, the capacitors being identically specified, and connected in parallel and disposed between the wires of positive voltage and negative voltage.