Systems and methods of RF power transmission, modulation, and amplification, including multiple input single output (MISO) amplifiers
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Abstract
Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
152 Citations
27 Claims
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1-24. -24. (canceled)
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25. A multiple input single output (MISO) amplifier, comprising:
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a plurality of inputs that receive a plurality of input signals;
a plurality of circuit branches coupled to said inputs, said circuit branches each comprising one or more transistors; and
an output;
wherein said input signals are amplified and combined to create an output signal at said output of said MISO amplifier;
wherein output voltages of said transistors in said circuit branches are substantially equal to an output voltage of said MISO amplifier for all operational instances of time of said MISO amplifier.
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26. A multiple input single output (MISO) amplifier, comprising any MISO embodiment illustrated in the figures.
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27. A multiple input single output (MISO) amplifier, comprising any MISO embodiment described in the specification.
Specification