Patent ID: 8531213

Claim:
A CMOS-inverter-type frequency divider circuit comprising: a plurality of CMOS inverters that contribute to realizing a frequency division function; a frequency division control section for performing control such that some or all of the plurality of CMOS inverters are intermittently driven at the respective different timings in accordance with an input signal; and a drive power supplying section for supplying powers for driving the plurality of CMOS inverters, and for, based on state information indicating whether VCO sub band selection or normal transmission is performed, switching some or all of the powers for the plurality of CMOS inverters between the VCO sub band selection and the normal transmission, wherein the drive power supplying section: when the state information indicates that the VCO sub band selection is performed, restricts the powers such that free-running frequencies of the CMOS inverters are not smaller than the maximum frequency that can be used in the VCO sub band selection, and when the state information indicates that the normal transmission is performed, restricts the powers such that free-running frequencies of the CMOS inverters are smaller than the maximum frequency that can be used in the VCO sub band selection, and are not smaller than the upper limit frequency of an actual use frequency band.