Power amplifier
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsGeunyong Lee, Seungchul Pyo
Life of this patent
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Abstract
A power amplifier includes a first power transistor configured to amplify an input radio-frequency (RF) signal, and output the amplified input RF signal as an output RF signal; a first transistor including a first terminal configured to provide a first bias current to the first power transistor; and a first linearizing circuit connected between a terminal of the first power transistor from which the output RF signal is output and the first terminal of the first transistor and configured to couple a portion of the output RF signal to the first terminal of the first transistor.
Claims20
A power amplifier comprising:
- a first power transistor configured to amplify an input radio-frequency (RF) signal, and output the amplified input RF signal as an output RF signal;
- a first transistor comprising a first terminal configured to provide a first bias current to the first power transistor;
- and
- a first linearizing circuit connected between a terminal of the first power transistor from which the output RF signal is output and the first terminal of the first transistor and configured to couple a portion of the output RF signal to the first terminal of the first transistor.
A power amplifier comprising:
- a first power transistor configured to amplify an input radio-frequency (RF) signal and output the amplified input RF signal as an output RF signal;
- a first bias circuit configured to generate a first bias current for biasing the first power transistor and comprising a first terminal from which the first bias current is output;
- a second power transistor configured to amplify the output RF signal;
- a second bias circuit configured to generate a second bias current for biasing the second power transistor and comprising a first terminal from which the second bias current is output;
- and
- a first linearizing circuit comprising an input terminal connected to a terminal of the first power transistor from which the output RF signal is output and configured to couple a portion of the output RF signal,
- wherein the first linearizing circuit is further configured to:
- provide the coupled output RF signal to the first terminal of the first bias circuit in a first power mode, and
- provide the coupled output RF signal to the first terminal of the second bias circuit in a second power mode.
A power amplifier comprising:
- a first power transistor comprising an input terminal and an output terminal, the input terminal of the first power transistor being configured to receive an input radio-frequency (RF) signal, and the first power transistor being configured to amplify the input radio-frequency RF signal and output the amplified input RF signal as an output RF signal from the output terminal of the first power transistor;
- a first transistor comprising a first terminal configured to provide a first bias current to the first power transistor;
- and
- a first linearizing circuit connected between the output terminal of the first power transistor and the first terminal of the first transistor and configured to compensate for a drop in a voltage of the input terminal of the first power transistor as an input power of the input RF signal of the first power transistor increases based on the output RF signal of the first power transistor.
Dependencies are inferred from the claim text.