Unlock instant, AI-driven research and patent intelligence for your innovation.

Efficient envelope tracking power supply and method based on power amplifier output signal control

A power amplifier and envelope tracking technology, which is applied in the direction of improving amplifiers to improve efficiency, amplifiers, improving amplifiers to expand bandwidth, etc., to achieve tracking efficiency, reduce hardware overhead, and overcome loop delay problems

Active Publication Date: 2020-03-17
XI AN JIAOTONG UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current improvement method does not solve the inherent problems such as the loop delay of analog hybrid power supply or the high hardware overhead of digital multilevel power supply.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Efficient envelope tracking power supply and method based on power amplifier output signal control
  • Efficient envelope tracking power supply and method based on power amplifier output signal control
  • Efficient envelope tracking power supply and method based on power amplifier output signal control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] see Image 6 As shown, the present invention is a high-efficiency envelope tracking power supply controlled based on the output signal of the power amplifier, including a digital control module, a linear amplifier and a switching amplifier. The digital control module includes a DAC, the output of the DAC is connected to the input of the linear amplifier, and the output of the linear amplifier is connected to the load; the linear amplifier includes a feedback loop; the digital control module provides a control signal output to the switching amplifier, and the output of the switching amplifier Connect the load; the monitoring unit detects the working characteristics of the load and feeds back to the digital control module.

[0034]In the present invention, the switching amplifier is directly controlled by the digital control module, and the digital control module calculates the control signal in advance according to the signal to be tracked, so that the total output wavef...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-efficiency envelope tracking power supply based on power amplifier output signal control and a method. The power supply comprises a digital control module, a linear amplifier and a switch amplifier. The digital control module comprises a DAC; the output end of the DAC is connected with the input end of the linear amplifier; the output end of the linear amplifier is connected with a load; the digital control module provides a control signal to the switch amplifier; and the output end of the switch amplifier is connected with the load. According to the power supply and the method, the loop delay problem is overcome through open loop control; through algorithm control, a current proportion of the switch amplifier is improved; the current needing to be provided by the linear amplifier is reduced; the static power consumption of the linear amplifier is reduced; the working state of the switch amplifier is optimized; and the tracking bandwidth is improved.

Description

technical field [0001] The invention belongs to the technical field of power supplies, in particular to an envelope tracking power supply and a control method, which can change the output voltage or output current according to the required load. Background technique [0002] The output of the envelope tracking power supply can change with the change of the required signal. It is usually used in the envelope tracking power amplifier circuit. Its function is to make the power amplifier power supply voltage follow the signal power change that needs to be amplified, thereby improving the efficiency of the power amplifier. The traditional implementation methods of power supply tracking complex signals include analog-controlled hybrid power supply and digital-controlled multi-level power supply. The circuit topology is as follows: figure 1 , figure 2 shown. [0003] The analog-controlled hybrid power supply uses a structure in which a switching amplifier and a linear amplifier ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02H03F1/48H03F1/32H03F3/217
CPCH03F1/02H03F1/32H03F1/48H03F3/217
Inventor 耿莉陈泽强范世全
Owner XI AN JIAOTONG UNIV