| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate frequency disturbance of a transmission signal or a local oscillation signal when transmitted and when a strong input signal is received in communication equipment for using radio waves to perform transmission and reception. <P>SOLUTION: This communication equipment has a voltage-controlled oscillator 20, a frequency dividing means 11 for applying frequency division to a signal generated from an oscillation output of the voltage-controlled oscillator 20, a phase comparing means 12 for detecting a phase error between an output of the frequency dividing means 11 and a reference signal, and a multiplying means 21 for making an output of the voltage-controlled oscillator 20 to be a first input. Even though a desired signal that is strongly inputted is received, a local oscillation signal is prevented from being disturbed because an output of the multiplying means 21 is supplied to a receiving means as the local oscillation signal and a signal obtained by applying 1/N frequency division to the output of the multiplying means 21 is made to be a second input of the multiplying means 21. <P>COPYRIGHT: (C)2004,JPO |
