Controller for an RF power amplifier
First Claim
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1. A controller for an RF amplifier, the controller comprising:
- a power supply for supplying power to the RF amplifier; and
a control unit for detecting an RF envelope of a signal input to the RF amplifier includes a look-up table having correction values that are addressed based upon the detected RF envelope signal, wherein the control unit performs predistorition and controls the power supply based on the correction values; and
a micro-controller and interface for modifying the correction values in the look-up table without feedback.
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Abstract
The controller controls the amplifier and a modulated power supply, supplying power to the amplifier, by detecting an RF envelope of a signal input to the amplifier. Predistortion of the amplifier synchronous with changes of bias is provided using a look-up table. Specifically, amplitude predistortion, phase predistortion and DC voltage level adjustments are made to the RF signal. Adjustments for gain and phase variation are applied synchronously with bias changes.
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Citations
18 Claims
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1. A controller for an RF amplifier, the controller comprising:
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a power supply for supplying power to the RF amplifier; and a control unit for detecting an RF envelope of a signal input to the RF amplifier includes a look-up table having correction values that are addressed based upon the detected RF envelope signal, wherein the control unit performs predistorition and controls the power supply based on the correction values; and a micro-controller and interface for modifying the correction values in the look-up table without feedback. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RF amplifier, comprising:
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a plurality of power stages providing power amplification; a power supply for supplying power to the RF amplifier; and a control unit for detecting an RF envelope of a signal input to the RF amplifier includes a look-up table having correction values that are addressed based upon the detected RF envelope signal, wherein the control unit performs predistorition and controls the power supply based on the correction values; and a micro-controller and interface for modifying the correction values in the look-up table without feedback. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of controlling an RF amplifier, comprising:
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detecting an RF envelope of a signal input to the RF amplifier; addressing stored correction values based on the detected RF envelope signal; and performing signal predistortion and controlling power supplied to the RF amplifier based on the correction values, wherein the correction values are modified without feedback.
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Specification