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Time and amplitude alignment in envelope tracking amplification stage

An envelope tracking, amplification stage technology, applied in the field of amplification stage, can solve problems such as amplitude error

Active Publication Date: 2014-06-25
SNAPTRACK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Amplitude errors are introduced in the amplification stage 150 of the envelope tracking modulator, the amplitude stage 134 of the input path, and the power feed network 104 for the amplifier

Method used

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  • Time and amplitude alignment in envelope tracking amplification stage
  • Time and amplitude alignment in envelope tracking amplification stage
  • Time and amplitude alignment in envelope tracking amplification stage

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Embodiment Construction

[0038] Now, with further reference to figure 2 An exemplary RF amplification architecture to describe the present invention, figure 2 The exemplary RF amplification architecture is modified according to the exemplary embodiment of the present invention figure 1 layout. However, the applicability of the present invention and its embodiments is not limited to figure 2 The exemplary architecture and implementation shown in .

[0039] refer to figure 2 , according to an exemplary embodiment of the present invention, the RF amplification architecture is adapted to include a calibration control stage 142 comprising a signal generation block 122, a programmable delay adjustment block 124, a measurement block 120 and a power control block.

[0040] as in figure 2The envelope signal, I data signal and Q data signal for each digital-to-analog converter 126a to 126c are generated by signal generation block 122 by means of programmable delay adjustment block 124 as shown in the ...

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Abstract

The invention relates to a method of calibrating an envelope path and an input path of an amplification stage including an envelope tracking power supply, the method comprising: generating input signals having a known relationship for each of the input and envelope paths; and varying an amplitude and a delay of the signal in one of the envelope and input paths in order to reduce the variation in the power detected in a signal at the output of the amplification stage.

Description

technical field [0001] The present invention relates to amplification stages utilizing an envelope tracking (ET) modulator to power an RF amplifier. Background technique [0002] refer to figure 1 , shows components of a known RF amplification architecture in which an envelope tracking (EF) modulator is used to power a radio frequency (RF) power amplifier. [0003] Such as figure 1 As shown in , RF power amplifier 102 receives an RF input signal to be amplified on input line 136 and receives a modulated supply voltage V on line 138 supply . RF power amplifier 102 generates an RF output signal on line 140 . An exemplary implementation of such an RF power amplifier is in a mobile communication system, connecting the RF output on line 140 to the front end of a radio transmission device. [0004] Such as figure 1 As shown in , the envelope signal representing the envelope of the RF input signal to be amplified is converted to an analog signal by a digital-to-analog convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02
CPCH03F1/0222H03F1/02G01R21/00H03F1/0233H03F3/19H03F3/21H03F2200/102H03F2200/105H03F2200/228H03F2200/324H03F2200/451
Inventor B·巴特拉姆
Owner SNAPTRACK