Power amplification system with envelope-based bias
First Claim
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1. A power amplification system comprising:
- a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal, the power amplifier including a plurality of cascode amplifiers coupled in parallel; and
a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal.
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Abstract
Disclosed herein are power amplification systems that are dynamically biased based on a signal indicative of an envelope of the signal being amplified. The power amplification systems include a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal. The power amplification systems also include a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. The biasing signal can improve or enhance the linearity of the power amplification systems.
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Citations
19 Claims
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1. A power amplification system comprising:
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a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal, the power amplifier including a plurality of cascode amplifiers coupled in parallel; and a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A radio-frequency (RF) module comprising:
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a packaging substrate configured to receive a plurality of components; and a power amplification system implemented on the packaging substrate, the power amplification system including a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal, the power amplifier including a plurality of cascode amplifiers coupled in parallel, and a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. - View Dependent Claims (17, 18)
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19. A wireless device comprising:
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a transceiver configured to generate a radio-frequency (RF) signal; a front-end module (FEM) in communication with the transceiver, the FEM including a packaging substrate configured to receive a plurality of components, the FEM further including a power amplification system implemented on the packaging substrate, the power amplification system including a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal, the power amplifier including a plurality of cascode amplifiers coupled in parallel, and a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal; and an antenna in communication with the FEM, the antenna configured to transmit the output RF signal received from the power amplification system.
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Specification