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Power amplifier overcurrent protection circuit and method

An overcurrent protection circuit and power amplifier technology, applied in the field of communication, can solve problems such as inconvenient maintenance of equipment, damage of power amplifiers, and inability to quickly cut off the current, so as to achieve simple and convenient maintenance of equipment, reduce costs, and improve safety in use

Pending Publication Date: 2021-08-20
DATANG MOBILE COMM EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, on the one hand, the overcurrent protection of the power amplifier depends on the fusing speed of the fuse. When the fusing delay is large, the current may not be cut off quickly, resulting in damage to the power amplifier; on the other hand, after the overcurrent occurs, The fuse needs to be replaced in time, making equipment maintenance inconvenient

Method used

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  • Power amplifier overcurrent protection circuit and method
  • Power amplifier overcurrent protection circuit and method

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Embodiment Construction

[0032] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0033] figure 1 It shows a schematic structural diagram of a power amplifier overcurrent protection circuit provided in this embodiment, including: a current detection resistor R1, an operational amplifier U1, a filter circuit, a digital-to-analog converter DAC (U4), a comparator (U2), Field programmable logic gate array FPGA (ie U3) and power amplifier U5;

[0034] see figure 1 , the two ends of the operational amplifier U1 are connected to the current detection resistor, and the output terminal of the operational amplifier U1 is connected to the input terminal of the filter circuit;

[0035] The output terminal of the filter circuit is connected to the positive i...

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Abstract

The invention provides a power amplifier overcurrent protection circuit and method. The circuit comprises a current detection resistor, an operational amplifier, a filter circuit, a digital-to-analog converter (DAC), a comparator, a field programmable gate array (FPGA) and a power amplifier. The two ends of the operational amplifier are connected with the current detection resistor, and the output end of the operational amplifier is connected with the input end of the filter circuit; the output end of the filter circuit is connected with the input positive end of the comparator, and the output end of the DAC is connected with the input negative end of the comparator; the output end of the comparator is connected with the input pin of the FPGA, and the output pin of the FPGA is connected with the input end of the power amplifier. According to the invention, the use safety of the power amplifier can be improved, the operation cost can be reduced, and the equipment maintenance of the RRU can be simpler and more convenient.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a power amplifier overcurrent protection circuit and method. Background technique [0002] The power amplifier is an important part of the RRU (Radio Remote Unit, radio frequency remote unit). When the power amplifier is over-current, the RRU cannot work normally. Therefore, in order to ensure the normal operation of the RRU, it is particularly important to realize the overcurrent protection of the power amplifier. [0003] At this stage, the overcurrent protection of the power amplifier is usually implemented by adding hardware. Specifically, usually a fuse can be connected in series at the input end of the power amplifier. When an overcurrent occurs, the fuse will be blown first, and the power amplifier will be turned off during the fuse blowing process to prevent damage to the power amplifier. In this way, on the one hand, the overcurrent protection of the power ampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/52
CPCH03F1/52
Inventor 赵鹏毅
Owner DATANG MOBILE COMM EQUIP CO LTD