Power amplifier
AssigneesSamsung Electro-Mechanics Co., Ltd., Korea Advanced Institute of Science and Technology
InventorsKi Yong Son, Gyu Suck Kim, Yoo Sam Na, Song Cheol Hong, Bon Hoon Koo
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Abstract
There is provided a power amplifier capable of increasing linear output power and efficiency without sacrificing an overall gain by employing a vector modulation function in a driving stage, with no separate vector modulator. The power amplifier includes a driving stage performing vector-modulation on an input RF signal to provide an I channel signal and a Q channel signal having different phases and amplifying the I channel signal and the Q channel signal to set gains; and a power stage amplifying power levels of the signals amplified by the driving stage.
Claims14
A power amplifier comprising:
- a driving stage performing vector-modulation on an input RF signal to provide an I channel signal and a Q channel signal having different phases and amplifying the I channel signal and the Q channel signal to set gains;
- and
- a power stage amplifying power levels of the signals amplified by the driving stage,
- wherein the driving stage amplifies the I channel signal and the Q channel signal to gains set based on preset values stored in a lookup table and selected according to envelope information of the input RF signal.
A power amplifier comprising:
- a driving stage performing vector-modulation on an input RF signal to provide an I channel signal and a Q channel signal having different phases and attenuating the I channel signal and the Q channel signal to set levels;
- and
- a power stage amplifying power levels of the signals amplified by the driving stag;
- wherein the driving stage attenuates the I channel signal and the Q channel signal to levels set based on preset values stored in a lookup table and selected according to envelope information of the input RF signal.
Dependencies are inferred from the claim text.