| 摘要 |
A power amplifier matching circuit of a mobile communication terminal is provided to reduce a manufacturing cost of the mobile communication terminal by reducing the number of parts of the circuit and to reduce a space by integrating circuits. A power amplifier matching circuit of a mobile communication terminal includes a power amplifier(210), a coupler(251), and a low pass filter matching unit(253). The power amplifier(210) amplifies an input signal to a frequency of a predetermined low frequency band and a high frequency band, and outputs the amplified signal to an output terminal. The coupler(251) is connected between the power amplifier(210) and the output terminal, detects and outputs a part of the output signal of the power amplifier(210). The low pass filter matching unit(253) is connected to the power amplifier(210), the coupler(251), and the output terminal. The low pass filter matching unit(253) matches an output impedance of the power amplifier(210), and passes a low frequency element of the signals outputted from the power amplifier(251). |
