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Low-noise amplification circuit and low-noise amplifier

A low-noise amplifier and circuit technology, applied in the field of low-noise amplifier circuits and low-noise amplifiers, can solve problems such as poor gain flatness and high-frequency gain decay, and achieve high gain and improved gain flatness

Active Publication Date: 2021-12-31
SOUTH CHINA UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problems of serious high-frequency gain attenuation and poor gain flatness existing in low-noise amplifiers in the prior art

Method used

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  • Low-noise amplification circuit and low-noise amplifier
  • Low-noise amplification circuit and low-noise amplifier
  • Low-noise amplification circuit and low-noise amplifier

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0038] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a capacitance could be termed a second capacitance, and, similarly, a second capacitance could be termed a first capacitance, without departing from the scope of the present application. Both the first capacitor and the second capacitor are capacitors, but they are not the same capacitor. ...

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PUM

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Abstract

The invention relates to a low-noiseamplification circuit and a low-noise amplifier. The low-noise amplification circuit comprises cascaded multi-stage amplification units, the cascaded multi-stage amplification units comprise a first-stage amplification unit, a second-stage amplification unit and a third-stage amplification unit, and the first-stage amplification unit comprises a first-stage amplification circuit and a first-stage negative feedback circuit; the second-stage amplification unit comprises a second-stage amplification circuit and a second-stage negative feedback circuit; and the three-stage amplification unit comprises a three-stage amplification circuit and a three-stage negative feedback circuit. The first-stage negative feedback circuit is used for reducing the low-frequency gain and the high-frequency gain of the alternating current signal in the first-stage amplification circuit. The secondary negative feedback circuit is used for reducing the low-frequency gain of the alternating current signal in the secondary amplification circuit. The three-stage negative feedback circuit is used for reducing the low-frequency gain of the alternating current signal in the three-stage amplification circuit. The low-noise amplifier can solve the problems that a low-noise amplifier in the prior art is serious in high-frequency gain decline and poor in gain flatness.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a low-noise amplifier circuit and a low-noise amplifier. Background technique [0002] Low-noise amplifiers are very critical modules in modern wireless communication systems, especially in wireless receivers, and are generally located at the front end of the receiver. The main function of the low-noise amplifier is to receive and amplify the low-power electrical signal from the antenna, and its performance directly affects the overall performance of the receiver system. [0003] There are many common low noise amplifier circuit structures, such as distributed low noise amplifiers, low noise amplifiers using high-order inductor-capacitor network matching, and stacked low noise amplifiers. Distributed low-noise amplifiers use transmission lines for input-output matching, which consumes a lot of area and power consumption; low-noise amplifiers with high-order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26H03F1/56H03F3/68
CPCH03F1/26H03F1/56H03F3/68H03F2200/294
Inventor 章秀银王克龙徐金旭宣凯龙华
Owner SOUTH CHINA UNIV OF TECH
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