Differential signal transmitting apparatus and differential signal receiving apparatus

摘要

A differential signal transmitting apparatus for transmitting a differential signal through two transmission lines. The apparatus includes: transmitting-side board connecting terminals that are provided for each of the transmission lines, and are able to connect a transmitting circuit for transmitting a differential signal; receiving circuit connecting terminals that are provided at a far end of a daisy-chain connection extending from the transmitting-side board connecting terminals provided for each of the transmission lines, and connect the receiving circuit for receiving the differential signal; and an undefined-logic preventing circuit that is connected at a near end of the daisy-chain connection and outputs a prescribed potential difference to the receiving circuit connecting terminals when the transmitting circuit is not connected to the transmitting circuit connecting terminals.