Patent ID: 7902835

Claim:
A transmission line driving circuit, comprising: a signal analyzing unit for analyzing contents of a signal pattern of an input signal; and a phase adjusting unit for adjusting a phase of the input signal according to an analysis result of the signal analyzing unit in such a direction that cancels a timing deviation caused by a loss occurring when the input signal is transmitted to a transmission line, wherein the transmission line driving circuit transmits an output signal of the phase adjusting unit to the transmission line, and wherein the signal analyzing unit has a plurality of filters having different cutoff frequencies for passing a low frequency component of the input signal and a gain adjusting unit for adjusting a gain of an output voltage of the filters and a combining unit for combining output voltages of the plurality of filters after the gain is adjusted by the gain adjusting unit, and the phase adjusting unit adjusts the phase according to a combined voltage of the combining unit, and wherein the gain adjusted by the gain adjusting unit is set according to a degree of a signal loss occurring on the transmission line.