An electronic circuit, comprising: a first oscillator configured to generate a reference signal; a plurality of phase synchronization circuits (131, 132, 133), wherein the first oscillator is operable to branch the generated reference signal and to output each of the resulting branched reference signals to each of the plurality of phase synchronization circuits (131, 132, 133); wherein each of the phase synchronization circuits includes: a second oscillator (143a, 143b, 143c); and a phase comparator (141a, 141b, 141c) configured to input, to the second oscillator, a first phase difference signal corresponding to a phase difference between an output signal generated by the second oscillator and the reference signal input to the phase synchronization circuit, the second oscillator configured to generate an output signal having a frequency corresponding to the signal input from the phase comparator; wherein the electronic circuit further comprises a phase control device (121, 122, 123) for each of the phase synchronization circuits; and a phase detector configured to perform a phase comparison on the first phase difference signals output from the phase comparators (141a, 141b, 141c) of the phase synchronization circuits, wherein the phase difference between the signals output from the second oscillators of two or more of the phase synchronization circuits is reduced by: configuring the phase detector to output a second phase difference signal, which indicates a phase difference based on the phase comparison, to the phase control devices (121, 122, 123), and configuring each phase control device (121, 122, 123) to adjust the phase of the reference signal input to the respective phase synchronization circuit based on the second phase difference signal. a first oscillator configured to generate a reference signal; a plurality of phase synchronization circuits (131, 132, 133), wherein the first oscillator is operable to branch the generated reference signal and to output each of the resulting branched reference signals to each of the plurality of phase synchronization circuits (131, 132, 133); wherein each of the phase synchronization circuits includes: a second oscillator (143a, 143b, 143c); and a phase comparator (141a, 141b, 141c) configured to input, to the second oscillator, a first phase difference signal corresponding to a phase difference between an output signal generated by the second oscillator and the reference signal input to the phase synchronization circuit, the second oscillator configured to generate an output signal having a frequency corresponding to the signal input from the phase comparator; wherein a second oscillator (143a, 143b, 143c); and a phase comparator (141a, 141b, 141c) configured to input, to the second oscillator, a first phase difference signal corresponding to a phase difference between an output signal generated by the second oscillator and the reference signal input to the phase synchronization circuit, the second oscillator configured to generate an output signal having a frequency corresponding to the signal input from the phase comparator; wherein the electronic circuit further comprises a phase control device (121, 122, 123) for each of the phase synchronization circuits; and a phase detector configured to perform a phase comparison on the first phase difference signals output from the phase comparators (141a, 141b, 141c) of the phase synchronization circuits, wherein the phase difference between the signals output from the second oscillators of two or more of the phase synchronization circuits is reduced by: configuring the phase detector to output a second phase difference signal, which indicates a phase difference based on the phase comparison, to the phase control devices (121, 122, 123), and configuring each phase control device (121, 122, 123) to adjust the phase of the reference signal input to the respective phase synchronization circuit based on the second phase difference signal. configuring the phase detector to output a second phase difference signal, which indicates a phase difference based on the phase comparison, to the phase control devices (121, 122, 123), and configuring each phase control device (121, 122, 123) to adjust the phase of the reference signal input to the respective phase synchronization circuit based on the second phase difference signal.