Patent ID: 8582273

Claim:
An electronic device, comprising: a surge absorbing circuit formed on a circuit board, the surge absorbing circuit comprising at least one surge suppression circuit, the at least one surge suppression circuit comprising, with respect to the same signal line: a power supply; a diode connected between the signal line and the power supply; a power supply line for connecting the diode and the power supply to each other; and at least one capacitor connected between the power supply line and a ground; wherein, in each of the at least one surge suppression circuit, a direction of the diode and a voltage of the power supply with respect to the signal line are determined so that the diode is reversely biased, wherein the ground is made of a ground pattern on the circuit board, wherein the signal line includes one end connected to an integrated circuit portion, and wherein the electronic device includes a connection point to a metal portion other than the circuit board, the connection point being provided between a connection point of each of the at least one capacitor to the ground pattern and a connection point of the integrated circuit portion to the ground pattern.