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A radio frequency power amplifier and its working method

A technology of radio frequency power and amplifier, applied in the field of radio frequency power amplifier, can solve the problem that the power gain cannot be too high, and achieve the effect of low quiescent current and power gain

Active Publication Date: 2017-11-07
RDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the limitation of the output dynamic range of the mainstream 3G RF transceiver, the power gain of the RF power amplifier is also required. In the low-to-medium power mode, the power gain should not be too high

Method used

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  • A radio frequency power amplifier and its working method
  • A radio frequency power amplifier and its working method
  • A radio frequency power amplifier and its working method

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Embodiment Construction

[0022] see figure 2 , which is the RF power amplifier of this application. It includes an input matching circuit 151 , two input stages 111 and 112 , an interstage matching circuit 152 , two output stages 121 and 122 , and four bias circuits 101 - 104 . The input matching circuit 151 is connected to two input stages 111 and 112 connected in parallel. The two input stages 111 and 112 connected in parallel are connected to the two output stages 121 and 122 connected in parallel through an interstage matching circuit 152 .

[0023] The four bias circuits 101 - 104 provide bias currents for the two input stages 111 and 112 and the two output stages 121 and 122 respectively. The two bias circuits that supply bias current to one of the input stages and one of the output stages have the same bias voltage one, and the other two bias circuits that supply the bias current to the other input stage and the other output stage have The same bias voltage two, both of which are provided b...

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Abstract

The application discloses a radio frequency power amplifier, which includes an input matching circuit, two input stages, an interstage matching circuit, two output stages, and four bias circuits. The input matching circuit is connected to the two input stages in parallel, and the two input stages in parallel are connected to the two output stages in parallel through the interstage matching circuit; the four bias circuits provide the two input stages and the two output stages respectively. bias current. The two bias circuits that supply bias current to one of the input stages and one of the output stages have the same bias voltage one, and the other two bias circuits that supply the bias current to the other input stage and the other output stage have same bias voltage as the second. While obtaining very high PAE in high-power working mode, the present application can also obtain lower quiescent current and power gain in medium-low power working mode while maintaining high PAE.

Description

technical field [0001] The present application relates to a radio frequency power amplifier with multiple working modes, and each working mode corresponds to a different output power range. Background technique [0002] With the rapid development of mobile communication technology, various mobile communication terminals have widely adopted 3G and even 4G standards. The radio frequency front-end module in the mobile communication terminal directly determines the standby and use time of the whole machine due to its large energy consumption. In order to minimize the energy consumption of the whole machine, it is an inevitable choice to improve the power-added efficiency (PAE) of the power amplifier in the RF front-end module. [0003] The 3G standard requires that the maximum linear output power of the radio frequency power amplifier in the mobile communication terminal be around 28dBm, and maintain a high PAE all the time. It is well known in the industry that as the output ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/189H03F3/20
Inventor 张辉张哲魏述然
Owner RDA TECH
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