Transmission device, transmission method, and communication system

A transmission method comprising:

• setting respective delay amounts of a plurality of delay sections on a basis of a transition of a symbol in a sequence of symbols;
• and
• causing a plurality of drivers provided to correspond to the plurality of delay sections to set a voltage at a corresponding output terminal to a mutually different voltage on a basis of a signal delayed by a corresponding delay section of the plurality of delay sections,
• wherein the plurality of delay sections include a first delay section, a second delay section, and a third delay section,
• wherein the plurality of drivers include
• a first driver that selectively sets a voltage at a first output terminal to one of a first voltage, a second voltage, and a third voltage interposed between the first voltage and the second voltage,
• a second driver that selectively sets a voltage at a second output terminal to one of the first voltage, the second voltage, and the third voltage, and
• a third driver that selectively sets a voltage at a third output terminal to one of the first voltage, the second voltage, and the third voltage, and
• wherein the voltages at the first output terminal, the second output terminal, and the third output terminal are different from one another.

A communication system comprising:

• a transmission device;
• and
• a reception device,
• the transmission device including:
• a plurality of delay sections having changeable delay amounts,
• a driver section that includes a plurality of drivers and transmits a data signal indicating a sequence of symbols using the plurality of drivers, the plurality of drivers being provided to correspond to the plurality of delay sections and setting a voltage at a corresponding output terminal to a mutually different voltage on a basis of a signal delayed by a corresponding delay section of the plurality of delay sections, and
• a controller that sets the respective delay amounts of the plurality of delay sections on a basis of a transition of a symbol in the sequence of symbols, wherein
• the plurality of delay sections include a first delay section, a second delay section, and a third delay section,
• the plurality of drivers include
• a first driver that generates a first transmission signal through selectively setting a voltage at a first output terminal to one of a first voltage, a second voltage, and a third voltage interposed between the first voltage and the second voltage,
• a second driver that generates a second transmission signal through selectively setting a voltage at a second output terminal to one of the first voltage, the second voltage, and the third voltage, and
• a third driver that generates a third transmission signal through selectively setting a voltage at the second output terminal to one of the first voltage, the second voltage, and the third voltage, and
• the reception device includes
• a first amplifier that generates a first differential signal through amplifying a difference between the first transmission signal and the second transmission signal,
• a second amplifier that generates a second differential signal through amplifying a difference between the second transmission signal and the third transmission signal,
• a third amplifier that generates a third differential signal through amplifying a difference between the third transmission signal and the first transmission signal, and
• a clock generator that generates a clock signal on a basis of the first differential signal, the second differential signal, and the third differential signal.