阅读说明：本技术 一种优化功放稳定度控制器 (Optimize power amplifier stability controller ) 是由 郝帅龙 李柬 张建军 钱建增 范玉进 李羚梅 于 2019-02-20 设计创作，主要内容包括：本发明创造提供一种优化功放稳定度控制器,包括数控衰减器、放大器、推动级功放、末级功放、单片机、温度检测芯片、功率检波芯片和电流检测芯片,所述数控衰减器的输出端与放大器的输入端电连接,所述放大器的输出端与推动级功放的输入端电连接,所述推动级功放的输出端与末级功放的输入端电连接,所述末级功放的输出端依次通过扼流线圈和电流检测芯片与单片机电连接,所述单片机还分别与数控衰减器、温度检测芯片和功率检波芯片电连接,所述功率检波芯片接入到推动级功放与末级功放之间。本专利通过电路结构的优化设计将改善射频功放的稳定性同时保证了其工作效率。(The invention provides a controller for optimizing power amplifier stability, which comprises a numerical control attenuator, an amplifier, a push-stage power amplifier, a final-stage power amplifier, a single chip microcomputer, a temperature detection chip, a power detection chip and a current detection chip, wherein the output end of the numerical control attenuator is electrically connected with the input end of the amplifier, the output end of the amplifier is electrically connected with the input end of the push-stage power amplifier, the output end of the push-stage power amplifier is electrically connected with the input end of the final-stage power amplifier, the output end of the final-stage power amplifier is electrically connected with the single chip microcomputer sequentially through a choke coil and the current detection chip, the single chip microcomputer is also electrically connected with the numerical control attenuator, the temperature detection chip and the power detection chip respectively. This patent will improve radio frequency power amplifier's stability through the optimal design of circuit structure and has guaranteed its work efficiency simultaneously.)

1. The utility model provides an optimize power amplifier stability controller which characterized in that: including numerical control attenuator, amplifier, promotion level power amplifier, final power amplifier, singlechip, temperature detection chip, power detection chip and current detection chip, numerical control attenuator's output is connected with the input electricity of amplifier, the output of amplifier is connected with the input electricity that promotes level power amplifier, the output that promotes level power amplifier is connected with the input electricity of final power amplifier, the output of final power amplifier loops through choke coil and current detection chip and is connected with the singlechip electricity, the singlechip still is connected with numerical control attenuator, temperature detection chip and power detection chip electricity respectively, the power detection chip inserts between promotion level power amplifier and the final power amplifier.

2. The controller of claim 1, wherein the controller is configured to: the input end of the numerical control attenuator is connected with a transmitting input signal.

3. The controller according to claim 1 or 2, wherein: the current detection chip is powered by leakage voltage.

4. The controller of claim 1, wherein the controller is configured to: the product model of the numerical control attenuator is PE4306, the product model of the amplifier is BIF3, the product model of the filter is SHCHU, the product model of the push-stage power amplifier is BLF245, the product model of the final-stage power amplifier is MRF136, the product model of the singlechip is C8051, the product model of the current detection chip is INA138, the product model of the power detection chip is AD8031, and the product model of the temperature detection chip is BAS 21.

Technical Field

The invention relates to the technical field of wireless communication, in particular to a controller for optimizing power amplifier stability.

Background

The radio frequency power amplifier is the core of a transmitting part in radio communication, the radio frequency power amplifier works in a stable state and is the premise of transmitting carrier signals, the power amplifier chip has requirements on the stability of static working voltage and power supply voltage, the stability of input excitation power and the change of temperature, and the traditional method is to enhance the stability of the amplifier in a negative feedback mode but greatly sacrifice the working efficiency of the power amplifier tube. Therefore, it is an urgent problem to develop a controller for optimizing the stability of power amplifier.

Disclosure of Invention

The invention aims to solve the technical problems and provides a controller for optimizing the stability of a power amplifier.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides an optimize power amplifier stability controller, includes numerical control attenuator, amplifier, promotion level power amplifier, final power amplifier, singlechip, temperature detection chip, power detection chip and current detection chip, numerical control attenuator's output is connected with the input electricity of amplifier, the output of amplifier is connected with the input electricity that promotes level power amplifier, the output that promotes level power amplifier is connected with the input electricity of final power amplifier, the output of final power amplifier loops through choke coil and current detection chip and is connected with the singlechip electricity, the singlechip still is connected with numerical control attenuator, temperature detection chip and power detection chip electricity respectively, the power detection chip inserts between promotion level power amplifier and the final power amplifier.

Furthermore, the input end of the numerical control attenuator is connected with a transmitting input signal.

Further, the current detection chip is powered by leakage voltage.

Furthermore, the product model of the numerical control attenuator is PE4306, the product model of the amplifier is BIF3, the product model of the filter is SHCHU, the product model of the push-stage power amplifier is BLF245, the product model of the final-stage power amplifier is MRF136, the product model of the singlechip is C8051, the product model of the current detection chip is INA138, the product model of the power detection chip is AD8031, and the product model of the temperature detection chip is BAS 21.

The invention has the advantages and positive effects that: this patent will improve the stability of radio frequency power amplifier through circuit structure's optimal design and has guaranteed its work efficiency simultaneously, can avoid getting into unstable operating condition because the amplifier self-oscillation that the fluctuation caused, greatly reduced the possibility of power amplifier tube damage, also improved the work efficiency of radio frequency power amplifier tube simultaneously greatly.

Drawings

Fig. 1 is a schematic block diagram of the invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in FIG. 1, a controller for optimizing the stability of power amplifier comprises a digital control attenuator, an amplifier, a push stage power amplifier, a final stage power amplifier, a single chip, a temperature detection chip, a power detection chip and a current detection chip, the input end of the numerical control attenuator is connected with a transmitting input signal, the output end of the numerical control attenuator is electrically connected with the input end of the amplifier, the output end of the amplifier is electrically connected with the input end of the push-stage power amplifier, the output end of the push-stage power amplifier is electrically connected with the input end of the final-stage power amplifier, the output end of the final-stage power amplifier is electrically connected with the singlechip through the choke coil and the current detection chip in turn, the single chip microcomputer is also respectively and electrically connected with the numerical control attenuator, the temperature detection chip and the power detection chip, the power detection chip is connected between the push-stage power amplifier and the final-stage power amplifier, and the current detection chip supplies power through leakage voltage.

The product model of the numerical control attenuator is PE4306, the product model of the amplifier is BIF3, the product model of the filter is SHCHU, the product model of the push-stage power amplifier is BLF245, the product model of the final-stage power amplifier is MRF136, the product model of the singlechip is C8051, the product model of the current detection chip is INA138, the product model of the power detection chip is AD8031, and the product model of the temperature detection chip is BAS 21.

The setting of a proper static operating point is a precondition, and the fluctuation of leakage voltage power supply, the fluctuation of input excitation power, the change of temperature and the instantaneous peak value of output power can cause the self-oscillation of a power amplifier chip to damage the power amplifier chip, so the variables are detected in real time, and the working stability of the amplifier is kept by adjusting the attenuation of a numerical control attenuator.

Detecting current change by using a current detection chip, transmitting a corresponding value detected by the current detection chip to an A/D end of the singlechip in real time, detecting the value by the singlechip in real time and judging, and if the fluctuation amplitude exceeds a preset range, turning off the supply of leakage voltage; the supply of the leakage voltage is connected with the leakage end of the power amplifier chip in a mode of a choke coil, so that a direct current power supply and a radio frequency signal are well isolated, and the transmission of the radio frequency power by the direct current power supply is avoided; the power detection chip performs power sampling through directional coupling, the sampling is attenuated to obtain a proper value, a detection diode detects the power to obtain a direct current level, the direct current level and the output power have a one-to-one corresponding linear relation, the A/D of the single chip microcomputer collects the data and judges the data, if the data exceed a threshold value, the data enter a numerical control attenuator adjusting program, and the size of the input excitation power is adjusted until the output power is stable; the temperature detection chip detects the real-time temperature of the output end structural body of the final power amplifier chip through a temperature sensor to judge the temperature of the power amplifier tube body at the moment, the A/D of the single chip microcomputer collects the data and judges the data, if the temperature resistance upper limit given by the power amplifier is close, the numerical control attenuator adjustment program is also adopted, and the input excitation power is adjusted until the temperature enters a proper range; by adopting the circuit design, the chip can be prevented from being permanently damaged, and the stable output power of the chip can be well ensured.

Proper quiescent operating point settings, isolation of the dc power supply from the rf signal, detection of output power fluctuations, temperature detection, and input fluctuation detection of leakage voltage can all reduce rf power amplifier fluctuations. The measures can avoid the amplifier from entering an unstable working state due to self-oscillation caused by fluctuation, greatly reduce the possibility of damage of the power amplifier tube and greatly improve the working efficiency of the radio frequency power amplifier tube.

The embodiments of the present invention have been described in detail, but the description is only for the purpose of describing the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the invention are also within the scope of the present patent.