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Terminal performance improvement circuit and mobile terminal

A technology of terminal performance and circuit, applied in the field of communication, can solve the problem of large occupied space, and achieve the effect of reducing circuit volume, convenient assembly and system optimization, and reducing the number of

Inactive Publication Date: 2017-05-31
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a terminal performance improvement circuit and a mobile terminal, aiming at solving the problem of using too many components and occupying a large space in order to attenuate the harmonic of nonlinear devices in the prior art

Method used

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  • Terminal performance improvement circuit and mobile terminal
  • Terminal performance improvement circuit and mobile terminal
  • Terminal performance improvement circuit and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 For the schematic diagram of the terminal performance improvement circuit provided by Embodiment 1 of the present invention, please refer to figure 1 , used in RF circuits with DC components, the circuit includes:

[0026] The radio frequency module 11 has a nonlinear device;

[0027] The LC series resonant circuit 12 is used to attenuate harmonics other than the fundamental wave, one end of which is connected to the output end of the radio frequency module, and the other end is connected to the radio frequency back-end circuit 13 .

[0028] In this embodiment, the nonlinear device in the radio frequency module may be a power amplifier, referred to as a power amplifier P, or may be a low noise amplifier LNA or the like.

[0029] When the signal in the terminal passes through a nonlinear device, such as a power amplifier, to generate nonlinear distortion such as the second harmonic, due to the frequency selection characteristic of the LC series resonant circui...

no. 2 example

[0045] figure 2 A schematic diagram of a terminal performance improvement circuit provided in this embodiment is applied to a radio frequency circuit with a DC component, including:

[0046] The radio frequency module 11 has a nonlinear device, wherein the nonlinear device is a low noise amplifier LNA;

[0047] The LC series resonant circuit 12 is used to attenuate harmonics other than the fundamental wave, one end of which is connected to the output end of the radio frequency module, and the other end is connected to the radio frequency back-end circuit 13 .

[0048] The LC series resonant circuit 12 includes a capacitor C1 and an inductor L1 connected in series. The LC series resonant circuit is connected to the non-linear output terminal 0 of the low noise amplifier LNA, and the other end is connected to the radio frequency back-end circuit. Wherein, the radio frequency back-end circuit may be grounded, may be connected to other devices, may be connected to other parts of...

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Abstract

The invention provides a terminal performance improvement circuit and a mobile terminal. The terminal performance improvement circuit is applied to a radio frequency circuit with a DC component and comprises a radio frequency module and an LC series resonance circuit, wherein the radio frequency module is provided with a nonlinear device; the LC series resonance circuit is used for carrying out attenuation processing on harmonic wave except for fundamental wave, one end of the LC series resonance circuit is connected to the output end of the radio frequency module and the other end of the LC series resonance circuit is connected to a radio frequency back-end circuit. Through the LC series resonance circuit, the attenuation processing on the harmonic wave except for the fundamental wave is realized, the enough harmonic attenuation effect is guaranteed while the number of components in the circuit is reduced, the circuit volume is reduced, and the convenience is provided for assembly of the components and system optimization.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a terminal performance improvement circuit and a mobile terminal. Background technique [0002] With the progress and development of science and technology, mobile terminal devices such as mobile phones have become necessities in people's daily life, and the corresponding requirements for mobile terminal devices are also getting higher and higher. [0003] However, due to the need to install nonlinear devices such as power amplifiers and low-noise amplifiers in the radio frequency modules of current mobile terminal equipment, these nonlinear devices will generate such as second harmonics or higher harmonics during work. The interference signal that adversely affects the work, that is, when the current flows through the nonlinear device, it will have a nonlinear relationship with the voltage applied to the nonlinear device, and will form a non-sinusoidal current, which will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/24H03H7/01
CPCH03H7/1783H03H7/24
Inventor 信哲鑫牛彦明
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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