Generation and amplification of substantially constant envelope signals, including switching an output among a plurality of nodes
First Claim
1. An apparatus for power amplification, comprising:
- a first circuit configured to generate a plurality of control signals;
a second circuit configured to receive said control signals and a frequency reference signal, wherein said second circuit generates a plurality of substantially constant envelope signals using said frequency reference signal and said plurality of control signals;
a multiple-input single-output (MISO) amplifier configured to amplify and combine said plurality of substantially constant envelope signals to generate an output signal;
a plurality of output nodes; and
a switch configured to switch said output signal to one of said plurality of output nodes.
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Accused Products
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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Citations
14 Claims
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1. An apparatus for power amplification, comprising:
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a first circuit configured to generate a plurality of control signals; a second circuit configured to receive said control signals and a frequency reference signal, wherein said second circuit generates a plurality of substantially constant envelope signals using said frequency reference signal and said plurality of control signals; a multiple-input single-output (MISO) amplifier configured to amplify and combine said plurality of substantially constant envelope signals to generate an output signal; a plurality of output nodes; and a switch configured to switch said output signal to one of said plurality of output nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of power amplification, comprising:
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generating a plurality of control signals; generating a plurality of substantially constant envelope signals using a frequency reference signal and said plurality of control signals; amplifying and combining said plurality of substantially constant envelope signals using a multiple-input single-output (MISO) amplifier to generate an output signal; and switching said output signal to one of a plurality of output nodes. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification