Phase detection device and method for detecting phase

A phase detection device comprising:

• a plurality of calculators, each calculator being configured to output a plurality of sampling control signals corresponding to transitions of two adjacent digital data signals from a plurality of digital data signals and control sampling timing for sampling the plurality of sampling control signals;
• a monitoring circuit configured to obtain the plurality of digital data signals, receive a multi-level signal having one of N signal levels (N is a positive number) from a transmitter, and generate a monitoring output signal using the plurality of digital data signals and the multi-level signal;
• a control logic circuit configured to compare the monitoring output signal with a first reference value and generate a plurality of calculator selection signals configured to drive the plurality of calculators;
• and
• a plurality of switches configured to transfer a driving voltage from a voltage source to the plurality of calculators based on the plurality of calculator selection signals.

A phase detection method comprising:

• computing a bit error rate based on a multi-level signal having one of N (N is a positive number) signal levels received from a transmitter and a digital data signal obtained from a time interleaved analog-to-digital converter;
• comparing the bit error rate with a first reference value;
• generating, based on a result value of the comparing, a plurality of calculator selection signals for turning on or off a plurality of switches respectively connected between a plurality of calculators and a voltage source;
• and
• supplying the calculator selection signals to the plurality of switches and a plurality of multiplexers configured to receive sampling control signals output from the plurality of calculators.