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Power amplifier

A power amplifier and power stage technology, applied in power amplifiers and other directions, can solve the problems of complex circuit structure and large phase difference, and achieve the effect of simple circuit structure and avoiding phase difference.

Inactive Publication Date: 2014-01-22
广州钧衡微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a power amplifier to solve the problems of complex circuit structure and large phase difference in the prior art

Method used

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] The invention provides a power amplifier to solve the problems of complex circuit structure and large phase difference in the prior art.

[0038] Specifically, such as figure 2 shown, including:

[0039] the first passage 101 and the second passage 102 connected in parallel;

[0040] A control circuit 103 connected to the first path 101 and the second path 102 respectively;

[0041] The power supply circuit 104 connected to the first path 101 and th...

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Abstract

The invention discloses a power amplifier. A control circuit controls bias voltage of a first access and bias voltage of a second access through a VN0 / VM1 mode, so that the first access and the second access achieve a high-power mode, a medium-power mode and a low-power mode respectively. Compared with the prior art, the power amplifier adopts three accesses to achieve the high-power mode, the medium-power mode and the low-power mode respectively, is simple in circuit structure, and can avoid large phase difference.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment, in particular to a power amplifier. Background technique [0002] Power amplifiers (RFPA) are widely used in various wireless communication devices and electronic systems, such as mobile phones, routers or other mobile terminals. For example, the power amplifier used in mobile phones is used to amplify the modulated transmission signal and obtain the output power that meets the requirements. The electromagnetic wave propagation between the mobile phone and the base station is not only affected by the communication distance, but also by the terrain and ground objects; in order to make the signal reaching the base station basically stable, the power amplifier in the mobile phone circuit generally has a multi-power mode. Commonly used power modes are generally divided into three types: high power mode, medium power mode and low power mode. [0003] Traditional multimode power am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
Inventor 张旭光
Owner 广州钧衡微电子科技有限公司
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