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Radio frequency power amplifier and application

A power amplifier and radio frequency power technology, which is applied in power amplifiers, amplifiers, improved amplifiers to improve efficiency, etc., can solve problems such as high gain and low gain, and achieve the effect of reducing power consumption and gain

Active Publication Date: 2020-06-26
RADROCK (SHENZHEN) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when RF power amplifier manufacturers design the low-power mode of the amplifier, they usually adopt the method of "configuring an independent low-power mode bias circuit for the first-stage / second-stage amplifying circuit", which can reduce the power consumption to a certain extent. The power consumption of the amplifier, but still not low enough, because the first-stage / second-stage amplifiers in this way need to be powered on, and the low-power mode requires the amplifier to have a relatively low gain (magnification), but the above method is due to two stage amplifier circuit is in working condition, its gain is still high

Method used

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  • Radio frequency power amplifier and application
  • Radio frequency power amplifier and application
  • Radio frequency power amplifier and application

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Effect test

Embodiment 1

[0049] refer to figure 1 The radio frequency power amplifier provided in this embodiment includes a first-stage amplifying circuit B, a second-stage amplifying circuit D and a control switch. Output after the amplifying circuit D; when the power amplifier works in low power mode, the radio frequency input signal is output after passing through the first stage amplifying circuit B and the control switch.

[0050] The above radio frequency power amplifier structure realizes switching in different modes by controlling the switch.

[0051] refer to Figure 2-10 As shown, in this embodiment, the RF power amplifier also includes one or any combination of the following functional circuits; wherein figure 2 The schematic diagram for A contains the following input matching circuit, image 3 is a schematic diagram including the following high-power mode first-stage bias circuit H; Figure 4is a schematic diagram including the following low-power mode first-stage bias circuit K; F...

Embodiment 2

[0070] like Figure 12 As shown, the radio frequency power amplifier provided in this embodiment includes:

[0071] A high-power mode branch, including at least two stages of amplifying circuits and a first control switch for controlling the working state of the branch;

[0072] A low-power mode branch, including at least one stage of amplification circuit and a second control switch for controlling the working state of the branch;

[0073] When the high power mode branch is working in the high power mode, the first control switch makes the high power mode branch in the working state to amplify the radio frequency input signal;

[0074] In the low power mode branch, when the power amplifying circuit works in the low power mode, the second control switch makes the low power mode branch in the working state to amplify the radio frequency input signal.

[0075] As shown in 13-22, in this embodiment, the radio frequency power amplifier also includes one or any combination of the...

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Abstract

The invention discloses a radio frequency power amplifier and application, the amplifier comprises a first-stage amplification circuit B, a second-stage amplification circuit D and a control switch; when the power amplifier works in a high-power mode, a radio frequency input signal passes through the first-stage amplification circuit B and the second-stage amplification circuit D and then is output; and when the power amplifier works in a low-power mode, a radio frequency input signal is output after passing through the first-stage amplification circuit B and the control switch. According to the radio frequency power amplifier provided by the invention, only one stage of amplifying circuit is in a working state in a low-power mode through the control switch, the power consumption and the gain of the radio frequency power amplifier can be controlled at a lower level, and the power consumption and the gain of the power amplifier in the low-power mode are reduced.

Description

technical field [0001] The invention belongs to the field of electronic circuits, and in particular relates to a radio frequency power amplifier and its application. Background technique [0002] The power amplifier is a device that can amplify the voltage or power of the input signal, so that the output power can be controlled within a specific range; the power amplifier is composed of electron tubes or transistors, power transformers and other electrical components; it is widely used in communications, broadcasting, radar, TV, automatic control and other devices. [0003] Radio Frequency Power Amplification (RF PA) is an important part of various wireless transmitters. In the front-end circuit of the transmitter, the power of the radio frequency signal generated by the modulation oscillator circuit is very small, and it needs to go through a series of amplification-buffer stage, intermediate The amplification stage and the final power amplification stage can only be fed t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/24H03F1/02
CPCH03F1/0205H03F3/245
Inventor 曹原胡自洁倪楠倪建兴
Owner RADROCK (SHENZHEN) TECH CO LTD