| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of an RFPLL output due to the leak of an IF harmonic component. SOLUTION: A filter 18 is provided for preventing an IF harmonic component generated with an IFVCO 14I from leaking to an RFVCO 14R side or from leaking to a transmitting/receiving RF mixer side on a feedback path from the IFVCO 14I to a signal input terminal finIF for an IF of a dual PLLIC 10, on a feedback path from the RFVCO 14R to a signal input terminal finRF for an RF of the dual PLLIC 10, or a signal supply path from the RFVCO 14R to the transmitting/receiving RF mixer.
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