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ALC-Based Power Amplifier Protection System

A technology for protecting systems and output terminals, applied in the field of mobile communications, can solve problems affecting the reliability of high-power equipment, etc.

Active Publication Date: 2017-03-08
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an ALC-based power amplifier protection system for the problem that the above-mentioned single-function power detection equipment affects the reliability of high-power equipment

Method used

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  • ALC-Based Power Amplifier Protection System
  • ALC-Based Power Amplifier Protection System
  • ALC-Based Power Amplifier Protection System

Examples

Experimental program
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Embodiment Construction

[0010] see figure 1 , figure 1 It is a structural schematic diagram of the first embodiment of the ALC-based power amplifier protection system of the present invention.

[0011] The ALC-based power amplifier protection system in this embodiment includes an attenuation circuit U2, a comparison circuit U7, and a current detection circuit 200. The current detection circuit 200 is used to detect the current consumed by the power amplifier device, and convert the current into a detection voltage V_def for output. , the first input terminal of the comparison circuit U7 is connected to the output terminal of the current detection circuit 200 for receiving the detection voltage V_def, the second input terminal is used for receiving the reference voltage V_ref, the output terminal is connected to the control terminal of the attenuation circuit U2, and the attenuation circuit U2 receives the control voltage V_alc or the detection voltage V_def through its control terminal, and performs...

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Abstract

The invention discloses a power amplifier protection system based on ALC. The power amplifier protection system comprises an attenuator circuit, a comparison circuit and a current detection circuit. The current detection circuit detects currents consumed by power amplifier equipment, converts the currents into detection voltage and outputs the voltage; the first input end of the comparison circuit is connected with the output end of the current detection circuit, the second input end of the comparison circuit is used for receiving reference voltage, the output end of the comparison circuit is connected with the control end of the attenuator circuit, and the attenuator circuit receives control voltage through the control end of the attenuator circuit or receives the detection voltage, and carries out automatic gain control on input signals under control of the control voltage or carries out ALC on the input signals under control of the detection voltage. According to the power amplifier protection system, output power is not fixed, control precision is high and has no obvious difference at the high temperature and low temperature, reliability of the power amplifier equipment is greatly improved, and the power amplifier protection system is especially applied to high-power power amplifier equipment.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an ALC-based power amplifier protection system. Background technique [0002] RF power amplification equipment is widely used in the mobile communication industry to increase signal transmission power and extend signal coverage. With the development of mobile communication standards, the bandwidth of application signals becomes wider and the peak-to-average ratio becomes higher, making the working environment more complex and unpredictable. Therefore, a device for controlling and protecting the radio frequency power amplifying device is needed. [0003] At present, the equipment for controlling and protecting the radio frequency power amplification equipment is usually a single-function power detection equipment. Single-function power detection equipment has the following disadvantages: fixed output power, which can easily lead to damage to devices with over-power ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/52H03G3/20
Inventor 王坤李洋洋李钢杨世朝
Owner COMBA TELECOM SYST CHINA LTD
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