Ultra low noise high linearity LNA for multi-mode transceiver

A high linearity and linearity technology, applied in low noise amplifiers, improved amplifiers to reduce nonlinear distortion, amplifiers with semiconductor devices/discharge tubes, etc., can solve the problems of increasing insertion loss and quality, and achieve ultra-low Effect of Noise, Good Performance, High Linearity Performance

Active Publication Date: 2014-05-07
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this bandpass filter adds insertion loss and mass

Method used

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  • Ultra low noise high linearity LNA for multi-mode transceiver
  • Ultra low noise high linearity LNA for multi-mode transceiver
  • Ultra low noise high linearity LNA for multi-mode transceiver

Examples

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Embodiment Construction

[0018] The detailed description set forth below, taken together with the accompanying drawings, is intended to illustrate various aspects of the present disclosure and is not intended to represent the only aspects in which the present disclosure may be practiced. Each aspect described in this disclosure is merely an example or illustration of the disclosure and should not necessarily be construed as preferred or advantageous over other aspects. Specific details are included in the detailed description in order to facilitate a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the present disclosure. Acronyms and other descriptive terms may be used merely for convenience and clarity and are not intended to limit the sco...

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Abstract

An amplifier for operating at low, middle or high linearity modes, the amplifier comprising a first low noise amplifier (LNA) coupled to a second low noise amplifier for providing amplification; a first degeneration inductor coupled to the first LNA for providing impedance matching; a −g3 generation block coupled to an output of the second LNA for canceling third-order transconductance distortion; and a first enabling / disabling component coupled to the output of the second LNA and aligned in parallel with the −g3 generation block for operating at least one of the first and second LNAs at one of the low, middle or high linearity modes.

Description

technical field [0001] The present disclosure generally relates to amplifiers. More specifically, the present disclosure relates to ultra-low noise high linearity LNAs. Background technique [0002] Existing multimode multistandard wireless communication systems require high performance radio receivers (also referred to as receivers). The multimode receiver must provide sufficient signal-to-noise ratio (SNR) performance for weak signals for maximum sensitivity performance. Additionally, multimode receivers must handle signal and interference levels linearly over a wide dynamic range with minimal distortion. That is, high linearity performance is required. Distortion is caused by, for example, intermodulation and gain compression. Higher linearity results in reduced intermodulation levels and gain compression. Therefore, low noise, high gain performance is also required. Often, receiver design techniques that provide both high linearity and low noise are difficult to ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/193H03F3/45H03F3/72
CPCH03F2203/7221H03F3/45183H03F2200/294H03F3/72H03F2203/45481H03F2203/45386H03F3/193H03F1/3211H03F2200/451H03F1/3205
Inventor Z·杨C·纳拉通B·孙
Owner QUALCOMM INC
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