Asymmetric Multilevel Outphasing Architecture For RF Amplifiers
First Claim
1. A radio frequency circuit comprising:
- a plurality of power amplifiers, each having at least one input port and an RF output port, wherein each power amplifier is configured to selectively provide an output signal having one of a plurality of discrete output amplitudes and an adjustable phase at its output port, at least two of the output signal amplitudes from different power amplifiers capable of being different ones of the plurality of discrete output amplitudes;
an RF power combiner circuit having a plurality of input ports coupled to RF output ports of the plurality of power amplifiers and an output port at which is provided an output signal of the RF circuit; and
a control system coupled to the at least one input port of each power amplifier and configured to control the output signal of the RF circuit by adjusting the phase and selecting the amplitudes of the output signals of said power amplifiers.
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Abstract
A radio frequency (RF) circuit includes a power supply configured to generate a plurality of voltages, a plurality of power amplifiers, each having an RF output port and a power supply input port, a switch network having a plurality of input ports coupled to the power supply and a plurality of switch network output ports coupled to the power supply input ports of the plurality of power amplifiers, wherein the switch network is configured to output selected ones of the plurality of voltages from the plurality of switch network output ports, at least two of the switch network output port voltages capable of being different ones of the plurality of voltages, and an RF power combiner circuit having a plurality of input ports coupled to RF output ports of the plurality of power amplifiers and an output port at which is provided an output signal of the RF circuit.
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Citations
11 Claims
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1. A radio frequency circuit comprising:
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a plurality of power amplifiers, each having at least one input port and an RF output port, wherein each power amplifier is configured to selectively provide an output signal having one of a plurality of discrete output amplitudes and an adjustable phase at its output port, at least two of the output signal amplitudes from different power amplifiers capable of being different ones of the plurality of discrete output amplitudes; an RF power combiner circuit having a plurality of input ports coupled to RF output ports of the plurality of power amplifiers and an output port at which is provided an output signal of the RF circuit; and a control system coupled to the at least one input port of each power amplifier and configured to control the output signal of the RF circuit by adjusting the phase and selecting the amplitudes of the output signals of said power amplifiers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification