CPC H02H 9/046 (2013.01) | 20 Claims |
1. A semiconductor integrated circuit comprising:
an input terminal;
a semiconductor circuit; and
a surge protection circuit connected between the input terminal and the semiconductor circuit, wherein the surge protection circuit includes:
a first clamping circuit including first and second diodes connected in series, a cathode of the first diode being connected to a positive power supply line, an anode of the first diode being connected to a cathode of the second diode, and an anode of the second diode being connected to a negative power supply line;
a second clamping circuit including third and fourth diodes connected in series, a cathode of the third diode being connected to the positive power supply line, an anode of the third diode being connected to a cathode of the fourth diode, and an anode of the fourth diode being connected to the negative power supply line; and
a first inductor connected between a first node and a second node, the first node being between the anode of the first diode and the cathode of the second diode with no resistor element between the first node and the anode of the first diode and between the first node and the cathode of the second diode, and connected to the input terminal, the second node being between the anode of the third diode and the cathode of the fourth diode and connected to the semiconductor circuit, no resistor element being provided between the first node and the second node.
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