The envelope pursuit amplifier, the mobile communication terminal which utilizes this and regarding that the profit improvement method of possessing the profit which is improved

摘要

(57) Abstract This invention is something regarding the envelope pursuit amplifier and the mobile communication terminal which utilizes this, and of being related to that the profit improvement method of possessing the profit which is improved. According to this invention, the envelope DC electric current which is detected from the RF signal is impressed in the very high frequency variable impedance element inside the impedance matching circuit. Therefore, signal level of the power amplifier rises or, variable capacitance entrance of the amplifier/revises output impedance change by going down. As a result, profit of the amplifier is improved, stability of the amplifier increases.