Electronic device, operating method thereof, and electronic system

An operating method of an electronic device comprising an analog bang-bang phase detector, the operating method comprising:

• generating a first sampling signal by sampling an input signal in response to edges of a clock signal;
• generating a first logic decision signal by comparing a voltage level of the first sampling signal with a reference voltage level;
• generating a first detection signal by the analog bang-bang phase detector performing an exclusive OR (XOR) operation on successive samples of the first logic decision signal;
• and
• varying a frequency of the clock signal according to the first detection signal.

An electronic system comprising:

• a communication block configured to receive an input signal from a system external to the electronic system;
• and
• a main processor configured to process at least one of arithmetic or logical operations in the electronic system,
• wherein the communication block is configured to:
• generate a first sampling signal by sampling the input signal in response to edges of a clock signal;
• generate a first logic decision signal by comparing a voltage level of the first sampling signal with a reference voltage level;
• generate a first detection signal, based on the first logic decision signal;
• and
• generate a clock signal having a frequency adjusted according to the first detection signal.