Transmission apparatus

A transmission apparatus comprising:

• a first amplitude detector for comparing a single ended signal inputted from a transmission line with a higher reference voltage as a predetermined voltage;
• and
• a second amplitude detector for comparing the single ended signal with a lower reference voltage as a predetermined voltage,
• wherein if the first amplitude detector detects that amplitude of the single ended signal is larger in value than the higher reference voltage, the first amplitude detector determines that a differential signal is a first level signal, if the second amplitude detector detects that the amplitude of the single ended signal is smaller in value than the lower reference voltage, the second amplitude detector determines that the differential signal is a second level signal, and
• wherein if the first amplitude detector detects that the amplitude of the single ended signal is smaller in value than the higher reference voltage, and the second amplitude detector detects that the amplitude of the single ended signal is larger in value than the lower reference voltage, the present differential signal is determined as the second level signal in the case where an immediately preceding differential signal is determined as the first level signal while the present differential signal is determined as the first level signal in the case where the immediately preceding differential signal is determined as the second level signal.

A signal detection method comprising:

• subjecting differential signals inputted from a transmission line to differential amplification by differential single converters, respectively, to be outputted as a single ended signal;
• comparing the single ended signal with a higher reference voltage as a predetermined voltage by use of a first amplitude detector;
• and
• comparing the single ended signal with a lower reference voltage as a predetermined voltage by use of a second amplitude detector,
• wherein if the first amplitude detector detects that amplitude of the single ended signal is larger in value than the higher reference voltage, the first amplitude detector determines that a differential signal is a first level signal,
• wherein if the second amplitude detector detects that the amplitude of the single ended signal is smaller in value than the lower reference voltage, the second amplitude detector determines that the differential signal is a second level signal, and
• wherein if the first amplitude detector detects that the amplitude of the single ended signal is smaller in value than the higher reference voltage, and the second amplitude detector detects that the amplitude of the single ended signal is larger in value than the lower reference voltage, the present differential signal is determined as the second level signal in the case where an immediately preceding differential signal is determined as the first level signal while the present differential signal is determined as the first level signal in the case where the immediately preceding differential signal is determined as the second level signal.