Abstract: A high-frequency module includes a high-speed logic circuit for processing an input digital signal having a transmission rate of several tens of Gbps by detecting the level of the input digital signal by using a clock having a frequency of several tens of GHz; a variable delay circuit for adding a specific amount of delay to the clock, and outputting the clock to the high-speed logic circuit, wherein the amount of delay is variably set in accordance with a manipulation signal; a phase comparator for measuring a phase difference between the input digital signal and the clock which is input into the high-speed logic circuit, and outputting a phase-difference signal in accordance with the phase difference; a filter for extracting a direct-current signal, which indicates the phase difference, from the phase-difference signal input from the phase comparator; and a controller for generating the manipulation signal assigned to the variable delay circuit, by using the direct-current signal input from the filter.