POWER AMPLIFICATION DEVICE, AND TRANSMISSION DEVICE AND COMMUNICATION DEVICE USING SAME

摘要

To provide a power amplification device that can amplify an input signal having an envelope variation with high power-added efficiency in a wide frequency range, and a transmission device and a communication device using the power amplification device. A first orthogonal signal (Sd1) is generated by performing vector subtraction between first and second fundamental signals (Su1 and Su2) having the same amplitude and a phase difference ´¸ (0 degrees<´¸<180 degrees) therebetween. First and second fundamental signals are generated based on an input signal (Sin). A second orthogonal signal (Sd2) is generated by performing vector addition between the first and second fundamental signals (Su1 and Su2). First and second constant envelope signals (S1 and S2) are generated by performing vector addition between the second fundamental signal (Su2) and first and second constant envelope vector generation signals (e and -e) obtained based on the first fundamental signal (Su1). An output signal (Sout) obtained by amplifying the input signal (Sin) is output based on the first and second constant envelope signals (S1 and S2).