Patent ID: 9219626
Filing Date: 2015-12-22
Classification: H04L

Abstract:
1. A data transmission system comprising: a sending unit that inputs a clock signal and a data signal and outputs a reference signal which is generated by delaying the input clock signal and a modulation signal which is either a signal the phase of which is shifted with respect to the reference signal in accordance with a state of the input data signal or the clock signal; a transmission unit that inputs the reference signal and the modulation signal which are output by the sending unit and transmits the input reference signal and the input modulation signal; a peaking unit that is arranged on transmission paths for the reference signal and the modulation signal and suppresses a development of peaking by applying inductor peaking to the signals on the transmission paths; a receiving unit that inputs the reference signal and the modulation signal via the transmission unit, demodulates the data signal by detecting a phase difference between the input reference signal and the input modulation signal, and outputs information on the data signal; and a control unit that inputs an output signal of the receiving unit and controls phase differences between at least two signals input to the receiving unit in an adjustment period during which phases are adjusted before data transmission; and a delay unit that outputs different signals in a data transmission period and the adjustment period in response to control by the control unit, wherein the control unit, in the adjustment period, outputs to the sending unit an adjustment command signal which commands output, to the transmission path, of an adjustment reference signal, which is a reference signal in the adjustment period, and an adjustment signal, which has a certain phase relation with the adjustment reference signal, and controls the delay unit so that a phase difference between the adjustment reference signal and the adjustment signal which are input to the delay unit is in a certain relation, the sending unit outputs the adjustment reference signal and the adjustment signal to the delay unit in response to the adjustment command signal, and the delay unit, in response to the control by the control unit, outputs the adjustment reference signal and the adjustment signal in the adjustment period and outputs the reference signal and the modulation signal in the data transmission period.