Power amplification by using different fixed power supply signals for the amplifier
First Claim
1. A method of performing power amplification under variable envelope excitation, comprising the steps of:
- converting an original input signal at least into a phase modulated signal part;
feeding at least the phase modulated signal part to an input port of an amplifier unit; and
amplifying the input signal by dynamically selecting a fixed power supply for the amplifier unit, wherein the amplitude content of the original input signal is reconstructed by changing dependent on the respective provided power supply a further controllable input of the amplifier unit, in particular the input power level and/or the biasing voltage and/or biasing current at the control input of the amplifier unit, during said step of amplifying.
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Abstract
The present invention proposes a power amplification under variable envelope excitation, wherein an original input signal at least is converted into a phase modulated signal part, at least the phase modulated signal part is fed to an input port of an amplifier unit, the input signal is amplified by dynamically selecting a fixed power supply (PSU 1, PSU 2, PSU 3) for the amplifier unit, and wherein the amplitude content of the original input signal is reconstructed by changing dependent on the respective provided power supply a further controllable input of the amplifier unit, in particular the input power level (Pin) and/or the biasing voltage (Ug) and/or biasing current at the control input of the amplifier unit, during said step of amplifying.
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Citations
10 Claims
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1. A method of performing power amplification under variable envelope excitation, comprising the steps of:
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converting an original input signal at least into a phase modulated signal part;
feeding at least the phase modulated signal part to an input port of an amplifier unit; and
amplifying the input signal by dynamically selecting a fixed power supply for the amplifier unit, wherein the amplitude content of the original input signal is reconstructed by changing dependent on the respective provided power supply a further controllable input of the amplifier unit, in particular the input power level and/or the biasing voltage and/or biasing current at the control input of the amplifier unit, during said step of amplifying. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power amplifier comprising
at least a final amplifier unit; -
means for feeding at least the phase modulated signal part of an original input signal to the input port of the amplifier unit;
at least two selectable power supply units with different fixed output powers connected to the supply port of the amplifier unit;
means for dynamically selecting a total supply power by selecting the respective power supply unit or units; and
means for controlling dependent on the respective selected supply power a further amplifier unit input, in particular the input power level and/or the biasing voltage and/or biasing current at the control input of the amplifier unit. - View Dependent Claims (8, 9, 10)
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Specification