POWER AMPLIFICATION SYSTEM WITH ADJUSTABLE COMMON BASE BIAS
First Claim
Patent Images
1. A power amplification system comprising:
- a first transistor having a base coupled to a radio-frequency input;
a second transistor having an emitter coupled to a collector of the first transistor and having a collector coupled to a radio-frequency output; and
a biasing component configured to apply a fixed biasing signal to the base of the first transistor and to apply an adjustable biasing signal to the base of the second transistor.
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Abstract
Power amplification system with adjustable common base bias. A power amplification system can include a first transistor having a base coupled to a radio-frequency input. The power amplification can further include a second transistor having an emitter coupled to a collector of the first transistor and having a collector coupled to a radio-frequency output. The power amplification system can include a biasing component configured to apply a fixed biasing signal to the base of the first transistor and to apply an adjustable biasing signal to the base of the second transistor.
14 Citations
20 Claims
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1. A power amplification system comprising:
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a first transistor having a base coupled to a radio-frequency input; a second transistor having an emitter coupled to a collector of the first transistor and having a collector coupled to a radio-frequency output; and a biasing component configured to apply a fixed biasing signal to the base of the first transistor and to apply an adjustable biasing signal to the base of the second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. 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 first transistor having a base coupled to a radio-frequency input, a second transistor having an emitter coupled to a collector of the first transistor and having a collector coupled to a radio-frequency output, and a biasing component configured to apply a fixed biasing signal to the base of the first transistor and to apply an adjustable biasing signal to the base of the second transistor. - View Dependent Claims (19)
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20. A wireless device comprising:
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a transceiver configured to generate a radio-frequency 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 first transistor having a base coupled to a radio-frequency input to receive the radio-frequency signal, a second transistor having an emitter coupled to a collector of the first transistor and having a collector coupled to a radio-frequency output, and a biasing component configured to apply a fixed biasing signal to the base of the first transistor and to apply an adjustable biasing signal to the base of the second transistor, and an antenna in communication with the FEM, the antenna configured to transmit an amplified version of the radio-frequency signal received from the radio-frequency output.
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Specification