| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission circuit capable of relaxing a design condition for the addition of a transmission frequency band. SOLUTION: This circuit is provided with a first bandpass filter 108 having a first transmission frequency band, a second bandpass filter 109 having a second transmission frequency band, first and second switching switches 107, 113 for switching the filters 108, 109 based on a transmission frequency band. Then, it is possible to relax design request of the bandpass filters and a power amplifier due to the addition of a new transmission band by switching the transmission circuit based on the frequency band.
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