Patent ID: 7130603

Claim:
A radio equipment enabling radio communication by performing frequency conversion corresponding to signals of different frequency bands, and including a local oscillator signal generator comprising: a first signal generator generating a first signal having a first frequency; a second signal generator having a second frequency divider to which a feedback signal is input, a second phase comparator comparing a phase of output signal of the second frequency divider with a phase of a second reference input signal having a predetermined frequency, a second filter filtering output signal of the second phase comparator, and a second voltage controlled oscillator which generates a second signal having a second frequency lover than the first frequency based on output signal of the second filter, and feedbacks the second signal to the second frequency divider as the feedback signal; and a frequency synthesizer synthesizing the first signal with the second signal, generating a local oscillator signal either having a frequency derived from adding the second frequency to the first frequency, or having a frequency derived from subtracting the second frequency from the first frequency, wherein the radio equipment uses the local oscillator signal generated by the frequency synthesizer for frequency conversion in the radio communication.