Dual-mode efficiency enhanced type linear power amplifier
A linear power, enhanced technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve the problem of difficult to achieve optimal impedance and accurate phase balance at the same time, difficult to tune Wilkinson power combiner, unable to achieve optimal Impedance and other issues to achieve the effect of reducing system complexity, improving system reliability and low loss
Active Publication Date: 2016-07-20
臻智微芯(广州)技术有限公司
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Problems solved by technology
This single structure provides multiple functions, it is difficult to achieve optimal impedance and precise phase balance at the same time
[0006] 3. The upper and lower channels are not truly independent of each other leading to a certain degree of tuning difficulty introduced by the Wilkinson power combiner
This made the switch-type LIPA not allow the flexibility to adjust the upper channel and the lower channel separately, for example, it was not possible to make one of the channels achieve the optimal impedance in the high power mode and the other channel achieve the optimal impedance in the low power mode.
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[0024] like figure 2 As shown, the dual-mode efficiency enhanced linear power amplifier includes a two-stage power amplifying circuit and an output circuit of a LIPA structure, wherein the two-stage power amplifying circuit of the LIPA structure is composed of a 45-degree phase-shifted two-stage amplifying branch circuit and a negative 45-degree phase-shifted two-stage amplification branch circuit is characterized in that: the output circuit includes a branch circuit A and a branch circuit B, and the branch circuit A includes an inductor L8, a capacitor C6, an inductor L10, and a capacitor C5, and the 45 The two-stage phase-shifting amplification branch circuit is electrically connected to the input end of the inductor L8, the output end of the inductor L8 is connected in series with the input end of the inductor L10 through the capacitor C6, one pole of the capacitor C5 is connected to the output end of the inductor L8, and the output end of the capacitor C5 The other pole i...
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The invention discloses a dual-mode efficiency enhanced type linear power amplifier. The dual-mode efficiency enhanced type linear power amplifier comprises a two-stage power amplifying circuit of an LIPA (load insensitive power amplifier) structure and an output circuit, wherein the two-stage power amplifying circuit of the LIPA structure consists of a 45-degree phase shift type two-stage amplifying branch circuit and a -45-degree phase shift type two-stage amplifying branch circuit. The dual-mode efficiency enhanced type linear power amplifier is characterized in that the output circuit consists of a branch circuit A and a branch circuit B, wherein the branch circuit A comprises an inductor L8, a capacitor C6, an inductor L10 and a capacitor C5, the branch circuit B comprises an inductor L9, a capacitor C7 and a capacitor C3, and a pole of the capacitor C3 in the branch circuit B and the output end of the inductor L10 in the branch circuit A are connected with the power output end RFOUT. The dual-mode efficiency enhanced type linear power amplifier has the advantages that one part of components are removed to decrease the number of the components, so that the whole design is cheaper, system complexity is lowered and system reliability is improved.
Description
technical field [0001] The invention relates to a power amplifier, in particular to a dual-mode efficiency linear power amplifier. Background technique [0002] High-efficiency LIPA (LoadInsensitivePowerAmplifier, that is, load insensitive power amplifier) allows good PAE (Power-AddedEfficiency, that is, power-added efficiency) at low output power levels. However, the PAE of this high-efficiency LIPA cannot perform well at various power levels. In order to improve the PAE of LIPA, a dual-mode efficiency-enhanced linear power amplifier design is proposed. This method is to make the high-efficiency LIPA has better PAE at both high and low power output levels. The current mobile phone suppliers need cheaper, smaller and better performance mobile phones. For WCDMA / CDMA power amplifiers, it is a very competitive demand to improve PAE at both high and low output power levels. [0003] In 2005, Skyworks invented a novel high-efficiency LIPA, such as figure 1 As shown, it incl...
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IPC IPC(8): H03F1/32
CPCH03F1/32
Inventor 李嘉进章国豪蔡秋富陈锦涛余凯林俊明
Owner 臻智微芯(广州)技术有限公司