Duty timing detector for detecting duty timing of toggle signal, device including the duty timing detector, and method of operating toggle signal receiving device

A duty timing detector, comprising:

• a first low-pass filter configured to receive an input toggle signal and output a DC input voltage based on a pulse width of the input toggle signal, wherein the input toggle signal repeatedly transitions between a high level and a low level;
• a voltage divider configured to divide the DC input voltage based on a predefined ratio, and to output a DC divided voltage;
• a latch configured to receive the input toggle signal and an output toggle signal that corresponds to the input toggle signal, and to generate a difference signal indicating an interval between edges of the input toggle signal and the output toggle signal;
• a compensation circuit configured to compensate a duty of the output toggle signal, based on the DC divided voltage and the difference signal;
• and
• an oscillator configured to generate a duty-compensated output toggle signal and provide the duty-compensated output toggle signal as the output signal that is input to the latch.

A device, comprising:

• a voltage converter configured to convert a first voltage into a second voltage using an input toggle signal, and to output the second voltage to a load, wherein the input toggle signal repeatedly transitions between a high level and a low level;
• and
• a current detector configured to detect an output toggle signal at a timing when a half of each duty of the input toggle signal has elapsed, and to detect a load current transmitted from the voltage converter to the load,
• wherein the current detector includes:
• a control logic configured to receive the input toggle signal and the output toggle signal, and to generate a difference signal using a difference between a duty of the input toggle signal and a duty of the output toggle signal;
• a first low-pass filter configured to output a DC input voltage based on a pulse width of the input toggle signal;
• a second low-pass filter configured to output a DC difference voltage based on a pulse width of the difference signal;
• a compensation circuit configured to compensate the duty of the output toggle signal using the DC input voltage and the DC difference voltage;
• and
• an oscillator configured to generate a duty-compensated output toggle signal, and to provide the duty-compensated output toggle signal to the control logic.