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US 12,470,179 B2Granted
RF transceiver front end module with improved linearity
AssigneeSkyworks Solutions, Inc.
InventorsZiv Alon, Maxwell L. Thomas
Life of this patent
Estimating the term…
Abstract
A power amplifier system front end measures both forward and reverse power associated with an RF transmit signal. A processor is configured to use measurements derived from the measured forward and reverse power output to adjust the RF transmit signal in order to compensate for one or more memory effects of the power amplifier system.
Claims20
A radio frequency system comprising:
- a radio frequency circuit including a power amplifier configured to amplify a radio frequency transmit signal to generate an amplified radio frequency transmit signal;
- one or more memory devices storing a plurality of entries generated during a pre-characterization of the radio frequency circuit under a plurality of characterization states corresponding to different input conditions;
- and
- a processor configured to receive measurements derived from the amplified radio frequency transmit signal, access entries of the plurality of entries based at least in part on the measurements, and, prior to amplification of the radio frequency transmit signal by the power amplifier, adjust the radio frequency transmit signal based on the accessed entries to compensate for one or more memory effects present in the radio frequency circuit.
1 more element
A mobile device comprising:
- a radio frequency circuit including a power amplifier configured to amplify a radio frequency transmit signal to generate an amplified radio frequency transmit signal;
- one or more memory devices storing a plurality of entries generated during a pre-characterization of the radio frequency circuit under a plurality of characterization states corresponding to different input conditions;
- a processor configured to receive measurements derived from the amplified radio frequency transmit signal, access entries of the plurality of entries based at least in part on the measurements, and, prior to amplification of the radio frequency transmit signal by the power amplifier, adjust the radio frequency transmit signal based on the accessed entries to compensate for one or more memory effects present in the radio frequency circuit;
- and
- an antenna configured to transmit the amplified radio frequency signal.
2 more elements
A method of processing a radio frequency transmit signal, comprising:
- amplifying a radio frequency transmit signal with a power amplifier of a radio frequency circuit to generate an amplified radio frequency transmit signal;
- receiving measurements derived from the amplified radio frequency transmit signal;
- accessing entries of a plurality of stored entries based at least in part on the measurements;
- and
- prior to amplification of the radio frequency transmit signal by the power amplifier, adjusting the radio frequency transmit signal based on the accessed entries to compensate for one or more memory effects present in the radio frequency circuit.
2 more elements
Dependencies are inferred from the claim text.