Systems and methods of RF power transmission, modulation and amplification, including embodiments for amplifier class transitioning
First Claim
1. An apparatus for power amplification, comprising:
- input circuitry that receives information, and that generates a plurality of control signals from said received information;
vector modulation circuitry, coupled to said input circuitry, that receives said control signals and a frequency reference signal, and that generates a plurality of substantially constant envelope signals using said frequency reference signal and said control signals;
a power amplifier that receives said substantially constant envelope signals and amplifies and combines said substantially constant envelope signals to create an output signal; and
means for controlling said power amplifier to transition between one or more amplifier classes of operation according to one or more control mechanisms described in FIG. 67.
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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.
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1 Claim
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1. An apparatus for power amplification, comprising:
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input circuitry that receives information, and that generates a plurality of control signals from said received information; vector modulation circuitry, coupled to said input circuitry, that receives said control signals and a frequency reference signal, and that generates a plurality of substantially constant envelope signals using said frequency reference signal and said control signals; a power amplifier that receives said substantially constant envelope signals and amplifies and combines said substantially constant envelope signals to create an output signal; and means for controlling said power amplifier to transition between one or more amplifier classes of operation according to one or more control mechanisms described in FIG. 67 .
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Specification