Transmitting circuit and complementary optical wiring system

A complementary optical wiring system comprising:

• a first light-emitting element configured to convert a first electric pulse signal in synchronization with a rising edge of a digital electric input signal into a first light signal;
• a second light-emitting element configured to convert a second electric pulse signal in synchronization with a falling edge of the digital electric input signal into a second light signal;
• a transmitting circuit comprising:
• (a) a first transmitter configured to generate the first electric pulse signal by combining at least one of the digital electric input signal and an inverted signal of the digital electric input signal with at least one of a first delay signal obtained by delaying the digital electric input signal by a time shorter than a minimum pulse width of the digital electric input signal and a second delay signal obtained by delaying the inverted signal of the digital electric input signal by a time shorter than the minimum pulse width of the digital electric input signal;
• (b) a second transmitter configured to generate the second electric pulse signal by combining at least one of the digital electric input signal and the inverted signal of the digital electric input signal with at least one of the first delay signal and the second delay signal;
• (c) a first variable impedance circuit configured to supply a bias current to the first light-emitting element only for a predetermined period before the first light-emitting element starts to be supplied with the first electric pulse signal;
• and
• (d) a second variable impedance circuit configured to supply a bias current to the second light-emitting element only for a predetermined period before the second light-emitting element starts to be supplied with the second electric pulse signal;
• a first optical transmission path configured to transmit the first light signal;
• a second optical transmission path configured to transmit the second light signal;
• a first light-receiving element configured to convert the first light signal transmitted through the first optical transmission path to the third electric pulse signal;
• a second light-receiving element configured to convert the second light signal transmitted through the second optical transmission path to the fourth electric pulse signal;
• and
• a receiving circuit configured to generate a digital electric output signal corresponding to the digital electric input signal in synchronization with the third and the fourth electric pulse signal.