High Voltage Envelope Tracker for Optimizing RF Power Amplifier Performance

An envelope tracker and radio frequency power technology, applied in the field of high voltage envelope trackers, can solve the problems of out-of-phase modulation radio frequency power amplifiers that are not widely used, difficult to design power combiners of out-of-phase modulation signals, etc., and achieve optimization. Linearity, improved efficiency, the effect of wide operating bandwidth

Active Publication Date: 2018-05-22
ETRA SEMICON SUZHOU CO LTD
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Problems solved by technology

The out-of-phase modulation RF power amplifier takes full advantage of the high-efficiency characteristics of the switching amplifier without sacrificing the linearity index; its disadvantage is that it requires additional calculation and power consumption in the signal decomposition part, and the power combination of the out-of-phase modulated signal device is difficult to design
These problems have also led to out-of-phase modulation RF power amplifiers not being widely used in portable mobile terminals.

Method used

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  • High Voltage Envelope Tracker for Optimizing RF Power Amplifier Performance
  • High Voltage Envelope Tracker for Optimizing RF Power Amplifier Performance
  • High Voltage Envelope Tracker for Optimizing RF Power Amplifier Performance

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Embodiment 1

[0036] figure 1 An envelope tracker proposed by the present invention is shown. The envelope tracker 101 receives a pair of differential envelope signal inputs V envp and V envn , while receiving a single-ended envelope signal V extracted from the differential envelope input AMP ; After being processed by the envelope tracker, one or several output signals are obtained as the power supply voltage of the radio frequency power amplifier. exist figure 1 Two power amplifiers 102 and 103 are shown in the figure as representatives, which are respectively a power amplifier for 3G / 4G standard and a power amplifier for 2G GSM standard. In practical applications, the number of radio frequency power amplifiers is not limited to two, but often more. The envelope tracker 101 mainly includes the following main functional modules:

[0037] 1. The boost module 104, its main function is according to the single-ended envelope signal V AMP The battery voltage V BATConverted to a DC volta...

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Abstract

The invention discloses a high-voltage envelope tracker for optimizing the performance of a radio frequency power amplifier, including a boost module, a step-down module, and a linear power drive module; The voltage VBAT is converted into a DC voltage slightly larger than the maximum envelope signal, and the DC voltage supplies power to the step-down module and the linear power drive module; the step-down module and the linear power drive module cooperate to supply power to the RF power amplifier to realize An undistorted power envelope; the linear power drive module receives a pair of differential envelope signal inputs Venvp and Venvn. The power supply envelope of the RF power amplifier can be controlled to optimize the efficiency of the power amplifier in a wide output power range and increase its operating bandwidth, which can improve the efficiency of the entire RF power amplification system.

Description

technical field [0001] The invention belongs to the technical field of radio frequency integrated circuits, and in particular relates to a high-performance radio frequency power amplifier for optimizing the performance of the radio frequency power amplifier by controlling the power supply envelope of the radio frequency power amplifier to optimize the efficiency of the power amplifier in a wide output power range and improve its operating bandwidth. Voltage Envelope Tracker. Background technique [0002] The RF power amplifier is an indispensable key component in various wireless communication applications. It is used to amplify the power of the modulated RF signal output by the transceiver to meet the power requirements of the RF signal required for wireless communication. Since modern portable wireless communication devices are usually powered by batteries, the power consumption requirements of the components used in the devices are very stringent. The RF power amplifier ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F1/02H03F1/42H03F3/193H03F3/20
Inventor 郭亚炜徐志伟张连星路宁
Owner ETRA SEMICON SUZHOU CO LTD
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