Receiver, system including the same, and calibration method thereof

A system comprising:

• a transmitter comprising a clock transmitter configured to transmit a clock signal to a clock channel and a data transmitter configured to transmit a data signal to a data channel;
• and
• a receiver comprising a clock receiver configured to receive the clock signal from the clock channel and a data receiver configured to receive the data signal from the data channel,
• wherein the clock receiver comprises a fixed delay unit configured to delay a first clock signal received from the clock channel by a predetermined time and output a second clock signal, the first clock signal being the clock signal received from the clock channel, and
• wherein the data receiver comprises:
• a first delay unit configured to delay the first clock signal in response to a first control signal;
• a first data sampler configured to sample the data signal received from the data channel in response to an output signal of the first delay and output a first data signal;
• a second delay unit configured to delay the first data signal in response to a second control signal and output a second data signal;
• a second data sampler configured to sample the second data signal in response to the second clock signal;
• and
• a delay controller configured to output the first control signal and the second control signal.

A calibration method of a receiver, which includes a fixed delay unit configured to delay a first clock signal received from a clock channel by a predetermined time and output a second clock signal;

• a first delay unit configured to delay the first clock signal in response to a first control signal;
• a first data sampler configured to sample a data signal received from a data channel in response to an output signal of the first delay unit and output a first data signal;
• a second delay unit configured to delay the first data signal in response to a second control signal and output a second data signal;
• a second data sampler configured to sample the second data signal in response to the second clock signal;
• and a delay controller configured to output the first control signal and the second control signal, wherein the delay controller determines the first control signal and the second control signal based on a pattern of data outputted from the second data sampler while a test signal is received from the data channel, the calibration method comprising:
• a first step of determining a second signal S2 k which corresponds to the second control signal, when a first signal S1 k is provided as the first control signal, wherein k ranges from 1 to N and N is a natural number equal to or larger than 1;
• and
• a second step of selecting any one signal pair Sm among a plurality of signal pairs S1 k and S2 k and determining the selected signal pair as the first control signal and the second control signal, wherein m ranges from 1 to N.