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Unbalanced Doherty power amplifier based on transformer and design method of unbalanced Doherty power amplifier

A technology for power amplifiers and transformers, applied in power amplifiers, amplifiers with semiconductor devices/discharge tubes, amplifiers, etc., can solve problems such as poor flexibility and demand adjustment peak points, and achieve good flexibility

Pending Publication Date: 2019-10-11
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

However, in the prior art, the efficiency peak point of the transformer-based Doherty power amplifier is fixed, and the peak point cannot be adjusted according to the efficiency requirement, so the flexibility is poor

Method used

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  • Unbalanced Doherty power amplifier based on transformer and design method of unbalanced Doherty power amplifier
  • Unbalanced Doherty power amplifier based on transformer and design method of unbalanced Doherty power amplifier
  • Unbalanced Doherty power amplifier based on transformer and design method of unbalanced Doherty power amplifier

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Embodiment Construction

[0034] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] In one embodiment of the present invention, a transformer-based unbalanced Doherty power amplifier is provided. Specifically, see Figure 4 , Figure 4 It is a schematic diagram of a transformer-based unbalanced Doherty power amplifier according to an embodiment of the present invention. Such as Figure 4 As shown, the transformer-based unbalanced Doherty power amplifier includes: main power amplifier unit (MainPA), secondary power amplifier unit (Aux.PA), first capacitor C1, second capacitor C2, first t...

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Abstract

The invention relates to an unbalanced Doherty power amplifier based on a transformer, in the field of radio frequency front-end integrated circuit design. A first transformer and a second transformerof a Doherty power amplifier are designed to have different self-inductances. The Doherty power amplifier is enabled to be an unbalanced Doherty power amplifier based on a transformer; and the position of the efficiency peak of the power back-off interval of the power amplifier can be adjusted by adjusting the self-inductance factor alpha of the first transformer T1, and then the peak point can be adjusted according to the efficiency requirement, so that the flexibility of the power amplifier is better.

Description

technical field [0001] The invention relates to the design of radio frequency front-end integrated circuits, in particular to a transformer-based unbalanced Doherty power amplifier and a design method thereof. Background technique [0002] Radio frequency power amplifier (RF PA) is an important part of various wireless transmitters, and is widely used in wireless communication devices such as mobile phones. In the pre-stage circuit of the transmitter, the RF signal power generated by the modulating oscillator circuit is very small, and it needs to go through a series of amplification-buffer stage, intermediate amplification stage, and final power amplification stage to obtain sufficient RF power before feeding radiate to the antenna. In order to obtain a sufficiently large radio frequency output power, a radio frequency power amplifier must be used. Output power and efficiency are the main technical indicators of RF power amplifiers. In order to meet the needs of various c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F3/195H03F3/213H03F3/24
CPCH03F1/0288H03F3/195H03F3/213H03F3/24
Inventor 任江川戴若凡
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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