Power amplification device, method and equipment
A power amplification and power amplification module technology, applied in the field of signal processing, can solve the problems of power amplifier burning, power amplifier environmental impact, power amplifier impedance mismatch, etc., achieving obvious effect, reducing the possibility of burning, reducing the total power Effect
Active Publication Date: 2021-09-17
GUANGZHOU HUIZHI MICROELECTRONICS
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Problems solved by technology
However, when the power amplifier outputs a high-power radio frequency signal, the impedance of the power amplifier is greatly affected by the environment. If the impedance of the power amplifier exceeds its design value during normal operation, the impedance mismatch of the power amplifier may be caused (also can be referred to as Power Amplifier Mismatch, or simply Mismatch)
[0003] Example 1. Different parts of the mobile phone held by a person may affect the impedance of the antenna, and the antenna is connected to the output of the power amplifier as the load of the power amplifier, that is, different parts of the mobile phone held by a person can further affect the impedance of the power amplifier; When there is a mobile phone in some special parts, it may cause mismatch; Example 2. Since the power amplifier is connected to the antenna through the radio frequency line, if the radio frequency line between the power amplifier and the antenna is not in good contact, it may also cause the impedance of the power amplifier to be disconnected. match
[0004] In the case of impedance mismatch of the power amplifier, the antenna will generate a reflected radio frequency signal, and reflect the reflected radio frequency signal to the power amplifier, and the power amplifier will perform power superposition of the reflected radio frequency signal and the amplified signal of the power amplifier, so that the power The total power and voltage of the amplifier are large, and when the total power and voltage of the power amplifier are too large, it may cause the power amplifier to burn out; and the more serious the mismatch, the greater the power of the reflected RF signal, and the total power and voltage of the power amplifier The bigger the , the more likely the power amplifier will burn out
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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0038] In the following description, references to "some embodiments" describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or a different subset of all possible embodiments, and Can be combined with each other without conflict.
[0039] In the following description, the term "first\second\third" is used as an example to distinguish different objects, and does not represent a specific order for the objects, and does not have a limitation on the sequence. It can be understood that "first\second\t...
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The invention discloses a power amplification device, method and equipment. The device comprises a power amplification module, an attenuation module, a power detection module and a load. The method comprises the steps of: obtaining a first transmitting signal through the power amplification module; generating, by the load, a first reflected signal based on the first transmitted signal; detecting a parameter of a first reflection signal through the power detection module; attenuating the first reflection signal based on the parameter through the attenuation module to obtain a second reflection signal; performing power superposition on the second reflection signal and the first emission signal through the power amplification module to obtain the total power of the power amplification module; and therefore, the possibility that the power amplifier is burnt down under the condition of mismatch can be reduced, and the more serious the mismatch is, the more obvious the reduction effect is.
Description
technical field [0001] This application relates to the technical field of signal processing, involving but not limited to power amplification devices, methods and equipment. Background technique [0002] With the development of communication equipment, the screen-to-body ratio of mobile phones continues to increase, and the antenna performance of mobile phones continues to decline; in this case, the power amplifier of the mobile phone is required to output a higher power radio frequency signal to ensure communication quality. However, when the power amplifier outputs a high-power radio frequency signal, the impedance of the power amplifier is greatly affected by the environment. If the impedance of the power amplifier exceeds its design value during normal operation, the impedance mismatch of the power amplifier may be caused (also can be referred to as power amplifier mismatch, or simply mismatch). [0003] Example 1. Different parts of the mobile phone held by a person ma...
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IPC IPC(8): H03F3/213H03F3/195H03F1/12H03F1/52
CPCH03F3/213H03F3/195H03F1/12H03F1/52
Inventor 蒋桂云邓金亮牛旭
Owner GUANGZHOU HUIZHI MICROELECTRONICS