Patent ID: 7701918

Claim:
A frequency adjustment device comprising: a first detecting section which detects a deviation of a frequency of a first signal contained in a received signal and having a short cycle time; a second detecting section which detects a deviation of a frequency of a second signal contained in the received signal and having a cycle time longer than that of the first signal; a determining section which determines a deviation of a frequency of the received signal on the basis of the deviation of the first signal detected by the first detecting section and that of the second signal detected by the second detecting section; and a frequency adjusting section which adjusts a frequency of the received signal on the basis of the frequency deviation determined by the determining section, wherein the first detecting section comprising: a first delay circuit which delays the received signal by a first delay time; and a first correlation computing section which is supplied with an output signal of the first delay circuit and the received signal, computes a correlation of the signals and outputs the frequency deviation, wherein the second detecting section comprising: a second delay circuit which delays the received signal by a second delay time which is longer than the first delay time; and a second correlation computing section which is supplied with the output signal of the second delay circuit and the received signal, computes a correlation of the signals and outputs the frequency deviation.