Bandwidth-expandable power supply for radio frequency power amplifier
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 expansion and improvement of peak-to-average ratio limitation, limitation of improvement of overall system efficiency, etc., to achieve the effect of bandwidth expansion, efficiency improvement, and reduction of switching frequency
Active Publication Date: 2020-04-17
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 invention discloses a bandwidth-expandable power supply for a radio frequency power amplifier. The bandwidth-expandable power supply for the radio frequency power amplifier comprises a linear unit, a comparison unit and a switch unit. The linear unit comprises more than two linear modules which are sequentially connected in parallel. The comparison unit at least comprises a comparison module.The switch unit at least comprises a switch module. According to the invention, envelope signals input to the radio frequency power amplifier are amplified through the multiple linear modules which are stacked in parallel; the problem that the output power is insufficient due to large signal bandwidth can be solved due to stacking of the output power of the multiple linear modules which are stacked in parallel; expansion of the power supply bandwidth of the radio frequency power amplifier is achieved; and in addition, the switch modules are graded through different levels of built-in thresholdvoltages of the comparison unit, so that the switching frequency of the switch modules can be reduced, and the power consumption can be reduced.
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