Electronic circuit configured to adjust skew between clock signals

An electronic circuit, comprising:

• a data recovery circuit to recover data from a received signal based on at least a first clock signal and a second clock signal which provide different timings;
• and
• a clock recovery circuit to adjust skew between the first clock signal and the second clock signal when the recovered data transitions from a first data value at a first timing of the first clock signal to a second data value at a second timing of the second clock signal following the first timing, wherein:
• the clock recovery circuit is to adjust the skew between the first clock signal and the second clock signal based on a result of a comparison of a second reference level higher than a first reference level and a third reference level lower than the first reference level with a first signal level associated with the first data value and a second signal level associated with the second data value, the first reference level corresponding to detection of a transition of the recovered data,
• a second delay of the second clock signal is to increase when a first delay of the first clock signal decreases to adjust the skew, and
• the second delay is to decrease when the first delay increases to adjust the skew.

An electronic circuit, comprising:

• a plurality of clock lines to transfer a plurality of clock signals based on different delays respectively;
• and
• a clock recovery circuit to adjust skew between the plurality of clock signals based on a result of a comparison of a plurality of detection reference levels with a plurality of signal levels of data respectively, the plurality of detection reference levels being different from a transition reference level corresponding to detection of a transition of data, the plurality of signal levels of the data at a plurality of successive timings of the plurality of clock signals, wherein:
• adjusting the skew is based on signs of errors of the plurality of signal levels with respect to the plurality of detection reference levels being different from each other, and
• directions in which at least two of the different delays are adjusted to adjust the skew are different from each other.