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US 9,319,214 B2Granted
Multi-mode power amplifier architecture
AssigneeRF Micro Devices, Inc.
InventorNadim Khlat
Life of this patent
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Abstract
Radio frequency (RF) circuitry, which includes a time division duplex (TDD)/frequency division duplex (FDD) driver stage, a TDD final stage, an FDD final stage, and power directing circuitry, is disclosed. The power directing circuitry is coupled between the TDD/FDD driver stage and the TDD final stage, and is further coupled between the TDD/FDD driver stage and the FDD final stage.
Claims19
Radio frequency (RF) circuitry configured to selectively operate in one of a TDD operating mode and an FDD operating mode, and comprising:
- an RF power splitter;
- a time division duplex (TDD)/frequency division duplex (FDD) driver stage;
- a TDD final stage, wherein during the TDD operating mode, the TDD final stage is configured to receive and amplify a first RF input signal from the RF power splitter to provide a first RF output signal;
- and
- an FDD final stage comprising an in-phase stage and a quadrature-phase stage, wherein during the FDD operating mode, the in-phase stage is configured to receive and amplify an RF in-phase input signal from the RF power splitter to provide an RF in-phase output signal, and the quadrature-phase stage is configured to receive and amplify an RF quadrature-phase input signal from the RF power splitter to provide an RF quadrature-phase output signal,
- wherein the RF power splitter is coupled between an output from the TDD/FDD driver stage and corresponding inputs to each of the in-phase stage, the quadrature-phase stage, and the TDD final stage.
3 more elements
Dependencies are inferred from the claim text.