Transformer parallel synthesis-based power amplifier

A transformer and amplifier technology, applied in the field of power amplifier circuits, can solve the problems of large chip area, increased application cost, and consumption, and achieve the effects of compact structure, reduced chip area, and high efficiency

Inactive Publication Date: 2018-10-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the power combination and load conversion of master and slave PA, Doherty PA usually needs to integrate a quarter-wavelength transmission line or at least two transformers on-chip, thus consuming a large chip area and increasing the application cost

Method used

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  • Transformer parallel synthesis-based power amplifier
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  • Transformer parallel synthesis-based power amplifier

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Embodiment

[0024] The power amplifier of the transformer parallel combination combined back-off efficiency enhancement technology proposed by the present invention has a compact structure, and can realize a parallel power combiner by only occupying the area of ​​a single transformer. According to the impedance conversion ratio, there are many ways to implement the transformer parallel power combiner, Figure 4 Give a symmetrical implementation. The primary coil 1 and the primary coil 2 have good symmetry, the master unit PA1 (110) and the slave unit PA2 (111) are placed on the same side of the power combiner, so that the current direction of the primary coil 1 and the primary coil 2 are in the same phase, which can be To the effect of electromagnetic enhancement, thereby improving the quality factor of the primary coil of the power combiner and effectively reducing the loss.

[0025] Therefore, the present invention proposes a low-cost, high-efficiency parallel combination of transformers...

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Abstract

The invention belongs to the technical field of wireless communication, specifically a transformer parallel synthesis-based power amplifier. The transformer parallel synthesis-based power amplifier comprises a transistor level active part and a transformer parallel synthesis-based passive network part. The active part is realized through adoption of a power amplifier of a voltage-mode pure analog,digital and analog mixed or all digital type. The passive part realizes parallel power synthesis, load impedance modulation and differential to single-ended conversion. According to the transformer parallel synthesis-based power amplifier, a power modulator module is removed; and for broadband application, the processing capacity far higher than a signal bandwidth is avoided. Compared with a traditional back-off efficiency enhanced power amplifier, the transformer parallel synthesis-based power amplifier has the advantages that quarter-wave transmission lines or a plurality of transformer forimpedance conversion are avoided, and only an area of the single transformer is occupied. The transformer parallel synthesis-based power amplifier is concise in structure and compact in area. The relatively high efficiency can be kept in a relatively wide output power range. The transformer parallel synthesis-based power amplifier is applicable to low cost and high efficiency demands of high peakaverage power ratio communication applications such as NB-IoT, LTE, a WLAN and 5G.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a power amplifier circuit. Background technique [0002] The rapid development of wireless communication technology has greatly changed people's lives. At present, smart phones and tablet computers supporting 2G / 3G / 4G / 5G mobile communication, wireless local area network (WLAN), Bluetooth (Bluetooth) and other applications have become part of people's daily life. The standard configuration. With the improvement of user experience of electronic equipment, people's demand for data transmission rate is getting higher and higher, and wireless communication standards are developing towards wider bandwidth and more complex modulation, such as 802.11ac / ax, LTE-A / LTE-pro, which It brings great challenges to the design of wireless transmitters, especially RF power amplifiers (PA). For example, the channel bandwidth supported by the 802.11ac standard increases f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F1/56H03F3/195H03F3/213
CPCH03F1/0288H03F1/565H03F3/195H03F3/213H03F2200/451H03F2200/541
Inventor 徐鸿涛殷韵
Owner FUDAN UNIV
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