Electronic devices converting input signals to digital value and operating methods of electronic devices

An electronic device comprising:

• an analog-to-digital converter circuit configured to convert a level of an input signal to digital input values in response to a clock signal;
• an oscillator configured to generate the clock signal;
• a first equalization circuit configured to operate in response to the clock signal and to generate digital output signals by equalizing the digital input values;
• a first phase detector circuit configured to operate in synchronization with the clock signal and to detect phases of the digital output signals and to generate digital phase values;
• a loop filter configured to operate in response to the clock signal and to generate a first digital output value based on the digital phase values;
• a second equalization circuit configured to generate digital intermediate values by equalizing the digital input values asynchronously;
• and
• a second phase detector circuit configured to detect phases of the digital intermediate values asynchronously and to generate a second digital output value,
• wherein the oscillator is configured to adjust a frequency of the clock signal based on the first digital output value and the second digital output value,
• wherein the analog-to-digital converter circuit includes:
• a plurality of analog-to-digital converters configured to convert the level of the input signal to the digital input values at different timings, and
• wherein the digital input values have different phases.

An operation method of an electronic device which includes a first equalization circuit and a second equalization circuit, the method comprising:

• receiving an input signal;
• converting a level of the input signal to a plurality of digital input values at different timings based on a conversion frequency, the plurality of digital input values having different phases;
• equalizing, at the first equalization circuit, the plurality of digital input values to generate a first output value;
• equalizing, at the second equalization circuit, the plurality of digital input values to generate a second output value;
• and
• adjusting the conversion frequency based on the first output value and the second output value.