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Device and method for realizing output power control of power amplifier

A power amplifier, output power technology, applied in the field of devices for power amplifier output power control, to achieve the effect of preventing damage and avoiding the quality of communication networks

Active Publication Date: 2014-09-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the abnormality of the output power feedback voltage of the power amplifier (the feedback value is lower than the expected power for a long time) cannot be effectively detected, so that the power amplifier cannot be prevented from working in a saturated state

Method used

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  • Device and method for realizing output power control of power amplifier
  • Device and method for realizing output power control of power amplifier
  • Device and method for realizing output power control of power amplifier

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Embodiment Construction

[0042] The technical solutions of the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments. Although the GSM base station system is used as an example below, it should be clear that this is only for illustration and explanation of the present invention, and does not constitute a limitation to the technical solution of the present invention.

[0043] like figure 2 Shown is the structure of an embodiment of the power amplifier output power control device of the present invention, including a peak detector 1 at the input end of the power amplifier and a peak detector 2 at the output end, an AD converter, a power control module, and a digitally controlled attenuator, wherein:

[0044] The peak detector 1 is used to detect the output signal power of the power amplifier, and output the output power detection voltage to the AD converter;

[0045] The peak detector 2 is used to detect the input signal power ...

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Abstract

A device and method for implementing the output power control of a power amplifier are provided, and the device comprises: a first peak detector of the output terminal of the power amplifier, an Analog-to-Digital Converter, a power control module and a second peak detector of the input terminal of the power amplifier. The device and method utilize the detected input signal power and output signal power of the power amplifier to compute the actual gain of the power amplifier, and obtain the input signal power threshold value of the power amplifier in different power levels; the input signal power and the corresponding threshold value are compared, and the corresponding operation is performed according to the comparison result to effectively prevent the power amplifier from operating in a saturation status and damaging the transmitter, and avoid cross coverage of the base station and affecting the quality of communication network.

Description

technical field [0001] The present invention relates to a power amplifier device and a method for controlling its output power, in particular to a device and method for controlling the output power of a power amplifier in a base station transmitter. Background technique [0002] In the field of wireless communication, the base station transmitter of the Global System of Mobile Communication (GSM, Global System of Mobilecommunication) generally adopts the closed-loop power control method, and its principle block diagram is as follows: figure 1 As shown, the output power of the base station is obtained through the peak voltage detection circuit at the output of the power amplifier (referred to as the power amplifier), and the obtained output power value is compared with the expected power. The comparison result is used to update the calibration value of the power control, and the calibration value is used to control The digitally controlled attenuator at the front end of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/20H03G3/20H04W88/08
CPCH03G3/3042
Inventor 郭启俊
Owner ZTE CORP