Optimized power amplifier and switching power supply topology
First Claim
1. A method comprising:
- providing a switching power supply, a first radio frequency (RF) power amplifier chain having a first final stage, and a second RF power amplifier chain having a second final stage;
during a first operating mode;
transmitting a first RF output signal from the first final stage; and
providing first envelope power to the first final stage via a switching power supply output signal; and
during a second operating mode;
transmitting the first RF output signal from the first final stage;
transmitting a second RF output signal from the second final stage;
providing first envelope power to the first final stage via the switching power supply output signal; and
providing second envelope power to the second final stage via the switching power supply output signal.
4 Assignments
0 Petitions
Accused Products
Abstract
The present disclosure relates to a single switching power supply that may either provide envelope power to a first RF power amplifier during a first operating mode, or simultaneously provide envelope power to the first RF power amplifier and to a second RF power amplifier during a second operating mode. In one embodiment, the single switching power supply and the first and second RF power amplifiers may be used in a multiple-input multiple-output (MIMO) RF communications system. As such, during the first operating mode, the first RF power amplifier may transmit a first RF output signal to a first antenna, and during the second operating mode, the first RF power amplifier may transmit the first RF output signal to the first antenna and the second RF power amplifier may transmit a second RF output signal to a second antenna, which may provide diversity.
7 Citations
28 Claims
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1. A method comprising:
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providing a switching power supply, a first radio frequency (RF) power amplifier chain having a first final stage, and a second RF power amplifier chain having a second final stage; during a first operating mode; transmitting a first RF output signal from the first final stage; and providing first envelope power to the first final stage via a switching power supply output signal; and during a second operating mode; transmitting the first RF output signal from the first final stage; transmitting a second RF output signal from the second final stage; providing first envelope power to the first final stage via the switching power supply output signal; and providing second envelope power to the second final stage via the switching power supply output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio frequency (RF) communications terminal comprising:
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a first RF power amplifier chain having a first final stage; a second RF power amplifier chain having a second final stage; a switching power supply adapted to provide first envelope power to the first final stage via a switching power supply output signal and adapted to provide second envelope power to the second final stage via the switching power supply output signal; and control circuitry coupled the second RF power amplifier chain and adapted to operate in a first operating mode, a second operating mode, and a third operating mode, such that; during operation in the first operating mode; the RF communications terminal transmits a first RF output signal from the first final stage; and the switching power supply provides the first envelope power to the first final stage; and during operation in the second operating mode; the RF communications terminal transmits the first RF output signal from the first final stage; the RF communications terminal transmits a second RF output signal from the second final stage; and the switching power supply provides the first envelope power and the second envelope power to the first final stage and the second final stage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification