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Power amplification circuit and its initialization method and power amplification method

A technology of power amplifier and initialization method, which is applied to power amplifiers, improved amplifiers to improve efficiency, improved amplifiers to reduce temperature/power supply voltage changes, etc., can solve the problems of inability to guarantee power amplifiers and gain high stability, and achieve Excellent linearity, stable gain, and excellent efficiency

Active Publication Date: 2008-01-16
AUCTUS TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0010] It can be seen that such temperature compensation cannot guarantee the high stability of the gain, and this temperature compensation for the gain cannot guarantee the linearity and efficiency of the power amplifier at high and low temperatures, and the requirements for linearity and efficiency are relatively high or have high The power amplifier with gain stability requirements cannot meet the requirements in this way

Method used

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  • Power amplification circuit and its initialization method and power amplification method
  • Power amplification circuit and its initialization method and power amplification method
  • Power amplification circuit and its initialization method and power amplification method

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Embodiment Construction

[0028] The structure of the power amplifier circuit of the present invention can be seen as shown in Figure 3 and Figure 4, including:

[0029] The power tube circuit amplifies the power of the input signal. In Figure 4, the power tube V1 and its peripheral circuits are responsible for amplifying the power, and then the port RFout outputs the amplified signal;

[0030] The voltage-controlled attenuator is connected to the power tube circuit to control and adjust the gain during power amplification. In Figure 4, the voltage-controlled attenuator N1 is connected to the power tube V1 to control the gain of the entire power amplifier circuit. make control adjustments;

[0031] The first bias circuit, connected to the bias terminal of the power tube circuit, controls the bias voltage of the power tube circuit; in Fig. 4, the first bias circuit is made up of operational amplifier A1B and its peripheral circuits, the The bias circuit can adjust and control the bias voltage of the po...

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Abstract

The invention discloses a power amplifier circuit comprising a digital potentiometer which comprises a temperature sensor, a memory, and a variable resistance, wherein the corresponding information of temperature data and variable resistance value is kept in the memory; the variable resistance is connected with the bias circuit, controlling the linear, the efficiency, and the gain of the power amplifier circuit. The invention also discloses an initializing method for the power amplifier circuit, comprising variable resistance value in digital potentiometer when different temperature record makes the linear, the efficiency, and the gain of the circuit reach a good index. The invention also discloses a power amplifying method for power amplifier circuit, changing variable resistance value according to the temperature information collected by temperature sensor and regulating the power control circuit to keep good linear, efficiency, and gain under different temperature.

Description

technical field [0001] The invention relates to a circuit, especially a power amplifier circuit. The invention also relates to a power amplifier circuit initialization method and a power amplification method. Background technique [0002] The power amplifier is an essential part in a modern communication system, and its cost can account for about 30% in a base station. It is used to amplify the analog signal so that it can be transmitted easily. Its main parameters are gain, linearity and efficiency. [0003] Among them, the gain refers to the amplification factor of the power amplifier to the radio frequency signal, usually in dB, which is used to represent the ratio of the output signal of the power amplifier to the input signal. Usually the system will require the power amplifier to have a stable gain. [0004] Linearity characterizes whether the power amplifier can truly amplify the signal. The better the linearity of the power amplifier, the smaller the distortion ...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F1/32H03F1/30H03F3/20
Inventor 韩华袁安伟闫志国刘德复
Owner AUCTUS TECH CO LTD
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