Electronic circuit, electronic apparatus, and method

An electronic circuit, comprising:

• a clock generator configured to generate a first clock signal;
• a delay element configured to output a second clock signal which has a phase delayed with respect to the first clock signal;
• a first electromagnetic coupler configured to transmit one of the first and second clock signals by electromagnetic coupling;
• a first frequency converter driven by the one of the first and second clock signals transmitted from the first electromagnetic coupler and configured to convert a first input signal to a first signal with a first frequency corresponding to the one of the first and second clock signals;
• a second electromagnetic coupler configured to transmit the first signal by electromagnetic coupling;
• a second frequency converter configured to convert the first signal transmitted from the second electromagnetic coupler, to a second signal with a second frequency corresponding to the first input signal, by using the other of the first and second clock signals;
• a controller configured to determine a delay amount of the first clock signal at the delay element based on an amplitude of the second signal;
• and
• an output device configured to output the second signal.