Method and apparatus for canceling balun amplifier noise

A technology of balanced conversion and amplifier, which is applied in the direction of improving the amplifier to reduce the impact of noise, parts of the amplifier, amplifier, etc.

Active Publication Date: 2012-07-04
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The differential CG LNA can reduce the power consumption to 3.6mW, but it can only provide an average NF of 3dB in the bandwidth of 0.3-0.92GHz

Method used

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  • Method and apparatus for canceling balun amplifier noise
  • Method and apparatus for canceling balun amplifier noise
  • Method and apparatus for canceling balun amplifier noise

Examples

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Embodiment Construction

[0083] Embodiments of several methods and devices for eliminating noise of the Balun amplifier will be disclosed below. In the following description, numerous specific details are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In this regard, any person skilled in the art should not use these specific details or make minor changes and modifications in actual operation without departing from the spirit and scope of the present invention. In other embodiments, in order to avoid unnecessarily obscuring the disclosure of the embodiments, structures and devices well known to those skilled in the art are represented by block diagrams.

[0084] Subsequent paragraphs present an example implementation of a summing and scaling apparatus and method for a CG-CS Balun amplifier with NF well below 3.5dB, power consumption below 10mW, and IIP3 between 0-3dBm. image 3 It is a schema...

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Abstract

The noise figure of a low noise amplifier (LNA) is reduced without sacrificing performance such as gain, IIP3, and wideband impedance matching. Embodiments include configuring a control module of the LNA to sum and scale an output from a current-sensing branch of the LNA and an output from a voltage sensing branch of the LNA into one or more summed and scaled outputs. The control module also feeds the one or more summed and scaled outputs back to at least one of the outputs of the branches of the LNA.

Description

technical field [0001] The present invention relates to an amplifier, and in particular to a balance-to-unbalance amplifier (Balance-to-Unbalance amplifier, Balun amplifier, hereinafter referred to as a balance amplifier). Background technique [0002] In the field of wired communication and wireless communication, emerging broadband communication technologies have emerged one after another, such as: Handheld Video Broadcasting (DVB-H) (470-890MHz) and Cognitive Radio (0.1-10GHz) Wait. Since a low-noise amplifier (LNA for short) is configured in the first-stage circuit of the receiver, the characteristics of the LNA will directly affect the overall performance of the receiver. Therefore, when dealing with wideband performance, designers will face more challenges, including how to design LNAs with wideband input matching and gain bandwidth. However, in order to achieve the aforesaid effects in traditional methods, the characteristics of noise figure (NF) are usually sacrifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26H03F3/45
CPCH03F2200/09H03F2203/45318H03F2200/294H03F2200/492H03F2200/456H03F3/45179H03F1/3205H03F2200/462H03F3/193H03F2200/471H03F2200/451
Inventor 郭明清施宜兴唐仕豪
Owner IND TECH RES INST
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