Patent ID: 8824613

Claim:
A signal transmission device comprising: a first communication module comprising: a first signal transmission unit configured to transmit a first transmission signal having a first amplitude to a second communication module through a predetermined transmission path, wherein the second communication module comprises a second signal transmission unit configured to transmit a second transmission signal having a second amplitude different from the first amplitude to the first communication module through the predetermined transmission path; and a delay time detection unit configured to detect, from a difference between a transition timing of the second transmission signal transmitted from the second communication module and a transition timing of the first transmission signal, a delay time occurring at a time of transmitting one of the first transmission signal or the second transmission signal through the predetermined transmission path, wherein the second communication module comprises a transmission timing adjustment unit configured to adjust a transmission timing of the second transmission signal by the second signal transmission unit based on the delay time so that the transition timing of the first transmission signal and the transition timing of the second transmission signal coincide with each other at a receiving end of the first communication module.