| 摘要 |
PROBLEM TO BE SOLVED: To improve power efficiency of the power amplifier circuit in a wireless communication device which has a mode where an output transistor (TR) operates being saturated and a mode where the output TR makes linear operation. SOLUTION: An electronic component (module) for a wireless communication device where at least an output power amplifier (Q1, Q2, Q3) and an impedance matching circuit (MN) are mounted on one insulation board and the impedance of an output terminal of the impedance matching circuit is selected to be 50 ohms, is provided with, at an impedance point having impedance lower than the impedance of the output terminal of the impedance matching circuit, a changeover circuit (410) that changes a circuit constant of the impedance matching circuit or a high frequency impedance when viewing the impedance matching circuit from the output power amplifier depending on an operating state. |
