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US 2004/0061555 A1Published application
Controller for an RF power amplifier
AssigneeLucent Technologies Inc.
InventorMichael Anthony Lynch
Life of this patent
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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.
Claims22
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 to provide predistortion and for controlling the power supply based upon the detected RF envelope.
An RF amplifier comprising:
- 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 to provide predistortion and for controlling the power supply based upon the detected RF envelope.
1 more element
A method of controlling an RF amplifier comprising:
- detecting an RF envelope of a signal input to the RF amplifier;
- providing signal predistortion based upon the detected RF envelope;
- and
- varying power supplied to the RF amplifier based upon changes to the detected RF envelope.
1 more element
Dependencies are inferred from the claim text.