Patent ID: 7863946

Claim:
An electric signal outputting apparatus in a serial electric transmission system, the electric signal outputting apparatus comprising: a switching part configured to switchably generate high and low output signals in accordance with signal data and transmitting the output signals to a transmission path; an impedance matching part configured to match an output impedance to the impedance of the transmission path; and an auxiliary switching part configured to subsidiarily supply current to an output node in the transmission path and to subsidiarily absorb current from the output node in the transmission path when the switching part switches the generation between high and low output signals; wherein the auxiliary switching part conducts the supplying and the absorbing for a period shorter than a pulse width of a reference clock of the serial electric transmission system based on a first data signal generated from the output signals and a second data signal generated from a delay buffer and having a time delay from the first data signal, and wherein the delay buffer includes a plurality of delay control inverters powered by a plurality of power supply sources, the plurality of delay control inverters being configured to reduce the time delay by increasing an electric current flowing in the plurality of power supply sources and to increase the time delay by reducing the electric current flowing in the plurality of power supply sources.