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US 12,587,150 B2Granted
Power amplifier linearity control based on power amplifier operating mode or power level
AssigneeSkyworks Solutions, Inc.
InventorGrant Darcy Poulin
Life of this patent
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Abstract
Radio frequency systems and methods adjust power amplifier operation based on power amplifier operating mode or power level to achieve a tradeoff between improved linearity at lower power levels and improved out of band noise performance and coexistence at higher power levels.
Claims20
A radio frequency front end system comprising:
- a first communication path including a power amplifier configured to amplify a radio frequency transmit signal in a first communication band for transmission via a first antenna;
- a second communication path including a receive amplifier, the second communication path configured to receive signals in a second communication band via a second antenna simultaneously with transmission in the first communication band by the first communication path;
- and
- a controller configured to control the power amplifier based on one or both of an operating mode of the power amplifier and a power level of the power amplifier, to operate according to a first output profile at a first power level, and to operate according to a second output profile at a second power level, the first power level lower than the second power level, and there being reduced out of band noise incident on the second communication path from the first communication path at the second power level according to the second output profile as compared to the first output profile at the second power level, despite the first output profile corresponding to higher linearity and lower error vector magnitude than the second output profile.
1 more element
A radio frequency system comprising:
- a transmit path including a power amplifier configured to amplify a radio frequency transmit signal for transmission in a first communication band via a first antenna;
- a receive path including a low noise amplifier, the receive path configured to receive signals in a second communication band via a second antenna;
- a controller configured to control the power amplifier based on one or both of an operating mode of the power amplifier and a power level of the power amplifier, to operate according to a first output profile at a first power level, and to operate according to a second output profile at a second power level, the first power level lower than the second power level, and there being reduced out of band noise incident on the second communication path from the transmit path at the second power level according to the second output profile as compared to the first output profile at the second power level, despite the first output profile corresponding to higher linearity and lower error vector magnitude than the second output profile;
- and
- a baseband processor.
2 more elements
A mobile device comprising:
- a first antenna and a second antenna;
- a first communication path including a power amplifier configured to amplify a radio frequency transmit signal for transmission in a first communication band via the first antenna;
- a second communication path including a receive amplifier, the second communication path configured to receive signals in a second communication band simultaneously with transmission in the first communication band by the first communication path;
- a controller configured to control the power amplifier based on one or both of an operating mode of the power amplifier and a power level of the power amplifier, to operate according to a first output profile at a first power level, and to operate according to a second output profile at a second power level, the first power level lower than the second power level, and there being reduced out of band noise incident on the second communication path from the first communication path at the second power level according to the second output profile as compared to the first output profile at the second power level, despite the first output profile corresponding to higher linearity and lower error vector magnitude than the second output profile;
- and
- a baseband processor.
3 more elements
Dependencies are inferred from the claim text.