Patent ID: 8139949

Claim:
An electrical signal transmission module, comprising: a plurality of optical signal lines converting a first externally input electrical signal into an optical signal, transmitting the optical signal, converting the optical signal back into the first electrical signal, and outputing the first electrical signal; and a plurality of electrical signal lines transmitting a second externally input electrical signal and outputting the second electrical signal, wherein each of the electrical signal lines is surrounded by the optical signal lines; wherein each of the optical signal lines comprises: a pair of transmission parts converting the first externally input electrical signal into the optical signal, converting the optical signal back into the first electrical signal, and outputting the first electrical signal; and an optical fiber connecting the transmission parts and transmitting the optical signal; wherein each of the transmission parts comprises: a light transmitter converting the first externally input electrical signal into the optical signal; a light receiver converting the optical signal back into the first electrical signal; an electrical circulator transmitting the first externally input electrical signal to the light transmitter and outputting the first electrical signal that is transmitted from the light receiver; and an optical circulator transmitting the optical signal converted by the light transmitter to the optical fiber and transmitting the optical signal that is transmitted from the optical fiber to the light receiver.