Low-noise amplifier and a front-end system with same

A low-noise amplifier and amplifying tube technology, applied in the field of TD-SCDMA radio frequency front-end systems, can solve the problems of high interference cost, high power consumption, low performance, etc., to improve system performance, reduce system power consumption, and filter out interference signals. Effect

Active Publication Date: 2012-07-25
LEADCORE TECH
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  • Description
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Problems solved by technology

[0013] In view of this, the present invention provides a low-noise amplifier and a TD-SCDMA radio frequency front-end

Method used

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  • Low-noise amplifier and a front-end system with same
  • Low-noise amplifier and a front-end system with same
  • Low-noise amplifier and a front-end system with same

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Embodiment Construction

[0038] For reference and clarity, descriptions, abbreviations or abbreviations of technical terms used in the following text are summarized as follows:

[0039] TD-SCDMA: Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access;

[0040] SAW: surface acoustic wave, surface acoustic wave filter;

[0041] LNA: Low Noise Amplifier, low noise amplifier;

[0042] Blocker: interference;

[0043] Cascode structure: Cascode structure.

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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 ...

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Abstract

The invention discloses a low-noise amplifier and a TD-SCDMA (time division-synchronous code division multiple access) radio-frequency front-end system with the same. Antenna receiving comprises a useful signal and a signal interfering signals. Firstly, matching processing is carried out on the useful signal through an input matching network and a blocker interference suppression network, and blocker interference is realized, so as to present high-impedance suppression; and then amplification processing is carried out on the signal through a core amplification tube of the low-noise amplifier; and finally frequency selection is carried out on the useful signal through outputting an LC frequency selection network, so as to output a non-interference signal; the blocker suppression network is designed in the low-noise amplifier, so as to displace an SAW (surface acoustic wave) filter outside a chip, and the blocker suppression network is combined with the input matching network; the received interference signals are filtered out from the LNA (low-noise amplifier), thus realizing the purposes that the interference signals are filtered out, simultaneously the area of the chip is reduced, the system power consumption is lowered, and the system performance is improved.

Description

technical field [0001] The present invention relates to the field of 3G wireless communication, and more specifically, relates to a low-noise amplifier and a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division-Synchronous Code Division Multiple Access) radio frequency front-end system having the low-noise amplifier . Background technique [0002] Currently, a board-level SAW filter (surface acoustic wave, surface acoustic wave filter) is generally used in wireless communication products to filter out out-of-band interference (blocker). SAW filters are made of quartz, lithium niobate, and barium titanate crystals that have piezoelectric properties. Crystals with piezoelectric effect can convert electrical signals into acoustic signals when they are acted on by electrical signals. Please refer to the attached figure 1 In order to use an interference filter (SAW filter) for a low noise amplifier (LNA, Low Noise Amplifier), the results obtained by...

Claims

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Application Information

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IPC IPC(8): H03F1/26H04B1/40
Inventor 李海松崔福良王伟
Owner LEADCORE TECH
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