Control systems and methods for power amplifiers operating in envelope tracking mode
First Claim
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1. A system for affecting operation of an envelope tracking (ET) amplifier, comprising:
- an ET amplifier configured to receive an RF input signal at an input terminal of the ET amplifier and generate therefrom, at an output terminal of the ET amplifier, an RF output signal based on a response of the ET amplifier; and
a set of operating parameters defining the response of the ET amplifier;
a control circuit adapted to detect an envelope of the RF input signal and generate based on said envelope signal a set of input-control signals that is provided to the ET amplifier for affecting the response according to the set of operating parameters, wherein at least two input-control signals of the set of input-control signals are bound by a mathematical relationship comprising at least one of;
a) scaling, b) amplitude shifting, c) phase shifting, and d) inverting.
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Abstract
Control systems and methods for power amplifiers operating in envelope tracking mode are presented. A set of corresponding functions and modules are described and various possible system configurations using such functions and modules are presented.
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Citations
35 Claims
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1. A system for affecting operation of an envelope tracking (ET) amplifier, comprising:
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an ET amplifier configured to receive an RF input signal at an input terminal of the ET amplifier and generate therefrom, at an output terminal of the ET amplifier, an RF output signal based on a response of the ET amplifier; and a set of operating parameters defining the response of the ET amplifier; a control circuit adapted to detect an envelope of the RF input signal and generate based on said envelope signal a set of input-control signals that is provided to the ET amplifier for affecting the response according to the set of operating parameters, wherein at least two input-control signals of the set of input-control signals are bound by a mathematical relationship comprising at least one of;
a) scaling, b) amplitude shifting, c) phase shifting, and d) inverting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification