Asymmetric Multilevel Backoff Amplifier with Radio-Frequency Splitter
First Claim
1. A radio frequency (RF) amplification system, comprising:
- a digital-to-RF modulator to generate a modulated RF signal based on input information indicative of amplitude values and phase values;
a plurality of RF amplifiers;
an RF power divider to split the modulated RF signal into a plurality of RF input signals for the plurality of RF amplifiers;
at least one voltage control unit to provide variable supply voltages to the plurality of RF amplifiers in response to at least one control signal; and
a controller to receive input data and to provide the input information to the digital-to-RF modulator and the at least one control signal to the at least one voltage control unit based, at least in part, upon the received input data.
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Accused Products
Abstract
A radio frequency (RF) amplification system or transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of RF input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. The system may include a single digital-to-RF modulator and a power divider to drive multiple power amplifiers. A power combiner may also be provided to combine outputs of the power amplifiers. In at least one implementation, amplitude adjustment of the RF input signals of the one or more power amplifiers may be used to provide transmit power control and/or power backoff.
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Citations
24 Claims
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1. A radio frequency (RF) amplification system, comprising:
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a digital-to-RF modulator to generate a modulated RF signal based on input information indicative of amplitude values and phase values; a plurality of RF amplifiers; an RF power divider to split the modulated RF signal into a plurality of RF input signals for the plurality of RF amplifiers; at least one voltage control unit to provide variable supply voltages to the plurality of RF amplifiers in response to at least one control signal; and a controller to receive input data and to provide the input information to the digital-to-RF modulator and the at least one control signal to the at least one voltage control unit based, at least in part, upon the received input data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radio frequency (RF) amplification system, comprising:
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a digital-to-RF modulator having a digital input port and an RF output port; a plurality of RF amplifiers, each of the RF amplifiers having an RF input port and an RF output port; an RF power divider having an RF input port coupled to the RF output port of the digital-to-RF modulator and having a like plurality of RF output ports with each of the RF output ports coupled to an RF input port of a respective one of the plurality of RF amplifiers; at least one voltage control unit to provide variable supply voltages to the first and second RF amplifiers in response to at least one control signal; and a controller to receive input data and to provide the input information to the digital-to-RF modulator and the at least one control signal to the at least one voltage control unit based, at least in part, upon the received input data. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification