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AssigneeRealtek Semiconductor Corp.
InventorsPO-CHIH WANG, YA-WEN YANG
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A radio frequency (RF) power amplifier is disclosed. The RF power amplifier includes an impedance transformation circuit, a current unit gain amplifier, and an output match circuit. The impedance transformation circuit receives a first input power signal and outputs a second input power signal correspondingly, wherein the impedance transformation circuit transforms an input impedance to an output impedance according to an impedance matching parameter for increasing power added efficiency of a pre-stage circuit. The current unit gain amplifier provides a linear transimpedance so as to transmit an input current to an output impedance, and then generate a linear output power for increasing power added efficiency of the current unit gain amplifier, wherein the impedance matching parameter is determined by a first system voltage, a second system voltage, and a predetermined power gain value.
A radio frequency (RF) power amplifier, electrically connected to a pre-stage circuit to receive a first input power signal, the RF power amplifier comprising:
A method for increasing a power added efficiency (PAE) and a linearity, adapted for a radio frequency (RF) power amplifier, the method comprising:
Dependencies are inferred from the claim text.