Power amplifying apparatus
A power amplifying apparatus includes a radio frequency (RF) power amplifier, a supply modulating unit, a phase shifting unit, and an envelope shaping unit. The RF power amplifier receives an input RF signal and outputs an amplified RF signal. The supply modulating unit provides the RF power amplifier with a supply voltage which varies with an original envelope of the input RF signal. The phase shifting unit receives a control signal and shifts a phase of the input RF signal to be inputted to the RF power amplifier by a shift amount which varies with the control signal. The envelope shaping unit receives the original envelope and provides the phase shifting unit with the control signal which varies with the original envelope.
Avago Technologies General IP (Singapore) Pte. Ltd.
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Jung-Hyun Young Sung-Hwan Jung-Rin
Kim Kwon Park Woo