A Bandwidth Extendable Power Supply for RF Power Amplifiers
A technology of radio frequency power and amplifier, applied in the field of power supply of radio frequency power amplifier, can solve the problems of improving the overall efficiency of the system, expanding and improving the peak-to-average ratio limitation, etc., to achieve the effect of improving efficiency, expanding bandwidth, and reducing switching frequency.
Active Publication Date: 2022-04-01
西安亚润微光电科技有限公司
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Problems solved by technology
[0002] The traditional envelope tracking system (ET) mostly adopts a hybrid power supply structure in which a linear unit is combined with a switching power supply. In this structure, the linear unit generally uses a combination of a linear amplifier and a class AB upper and lower power tube. However, due to the feedback adjustment of the classAB lower tube During the process, it will often be turned on to form a pull current from the output to the ground
This current has a negative contribution to the output power and system efficiency, which limits the improvement of the overall system efficiency to a certain extent. At the same time, the overall larger output tube of the class AB output stage will further expand the bandwidth and improve the front end. Average ratio brings restrictions
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[0053] In the following description, numerous details are set forth in order to provide a more thorough illustration of embodiments of the disclosure. It will be apparent, however, to one skilled in the art that embodiments of the present disclosure may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the present disclosure. Furthermore, features of different embodiments described below may be combined with each other unless specifically stated otherwise.
[0054] As used in this disclosure, the terms "include" and "have" and any variations thereof are intended to be inclusive and not exclusive. For example, a process comprising a series of steps or units, or a method, or a system, or a product or a device is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally It ...
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The present disclosure discloses a power supply for a radio frequency power amplifier with an expandable bandwidth, including: a power supply for a radio frequency power amplifier with an expandable bandwidth, including: a linear unit, a comparison unit and a switch unit; wherein the linear The unit includes more than two linear modules sequentially connected in parallel; the comparison unit includes at least one comparison module; the switch unit includes at least one switch module. The disclosure realizes the amplification processing of the envelope signal input to the radio frequency power amplifier through multiple linear modules superimposed in parallel, and the multiple linear modules connected in parallel can make up for the lack of output power caused by the large signal bandwidth due to the superposition of output power. problem, so as to realize the expansion of the power supply bandwidth of the RF power amplifier; in addition, the switching module is classified by comparing the different levels of built-in threshold voltages of the unit, which can reduce the switching frequency of the switching module, thereby reducing power consumption.
Description
technical field [0001] The disclosure belongs to the field of mobile communication, and in particular relates to a power supply for radio frequency power amplifiers with expandable bandwidth. Background technique [0002] The traditional envelope tracking system (ET) mostly adopts a hybrid power supply structure of a linear unit combined with a switching power supply. In this structure, the linear unit generally uses a combination of a linear amplifier and a class AB upper and lower power tube. However, due to the feedback adjustment of the classAB lower tube During the process, it will often be turned on to form a pull current from the output to the ground. This current has a negative contribution to the output power and system efficiency, which limits the improvement of the overall system efficiency to a certain extent. At the same time, the overall larger output tube of the class AB output stage will further expand the bandwidth and improve the front end. The average rat...
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IPC IPC(8): H03F1/02H03F3/19H03F3/24
CPCH03F1/0205H03F3/19H03F3/245
Inventor 郑巍何世宝
Owner 西安亚润微光电科技有限公司