Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Variable gain broadband low-noise amplifier

A broadband low-noise, amplifier technology, which is applied in the direction of improving amplifiers to reduce noise impact, artificial gain control, etc., can solve problems such as feedback loop voltage fluctuations, circuit complexity, etc., and achieve the effect of saving power consumption

Inactive Publication Date: 2013-02-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the circuit complexity caused by the multi-stage structure of the variable gain broadband low noise amplifier in the past, and also solve the problem that the feedback loop is affected by the voltage fluctuation of the output node, which is different from the typical variable gain broadband low noise amplifier. Compared with the noise amplifier, the present invention only adopts one-stage amplifying circuit, and realizes the variable gain function of the broadband low noise amplifier by changing the feedback loop and the load impedance at the same time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Variable gain broadband low-noise amplifier
  • Variable gain broadband low-noise amplifier
  • Variable gain broadband low-noise amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Combine below image 3 The variable gain broadband low noise amplifier of the present invention will be further described.

[0021] The variable-gain broadband low-noise amplifier of the present invention includes: a cascode input stage, an active feedback structure, a switch-controlled high-gain and low-gain mode feedback loop, and a variable load resistor corresponding to the corresponding working mode.

[0022] The connections and functions of each part are as follows:

[0023] Vin is the radio frequency input and input, Vout is the radio frequency output signal, Vb is the DC bias port of the input stage, and Switch is the switch control port.

[0024]NMOS transistor MN1, PMOS transistor MP1, and NMOS transistor MN2 together form a cascode amplifier structure. PMOS transistor MP1 acts as a current steering branch, which can share part of the current of MN1 to relieve the "pressure" caused by the voltage drop of the load resistance. ”, while increasing the input tra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a variable gain broadband low-noise amplifier, and relates to a radio-frequency integrated circuit technology. The amplifier mainly consists of a common source and common gate input stage, an active feedback structure, a switch controlled feedback loop of high gain and low gain modes and variable load resistors corresponding to the corresponding working modes. The low-noise amplifier can be switched between a high gain mode and a low gain mode by a method of judging whether a switch controlled current mirror works normally in a feedback loop, and the feedback loop consists of an active device and a resistor. The circuit does not contain an inductor, so the area of a chip is saved to a great extent; and compared with the amplifier adopting amplifying circuits of two stages and more stages to control the gain, the amplifier only containing a primary amplifying circuit has the advantages that: the properties such as power consumption, noise and the like are improved to a certain extent, and the amplifier is suitable to be used in a multi-standard wireless communication receiving system.

Description

technical field [0001] The invention belongs to the technical field of radio frequency integrated circuit design, is applied to the radio frequency front end of a receiver, is a broadband low noise amplifier applicable to various wireless communication standards, and can realize switching operation in two modes of high gain and low gain at the same time. Background technique [0002] With the rapid development of communication technology, it has brought a lot of convenience to people's life, military and national defense and other related fields are also inseparable from the promotion of the electronic information industry. Nowadays, the competition in the high-tech information industry is becoming increasingly fierce, and wireless communication also follows become highly valued by humans. In recent years, my country has gradually strengthened its emphasis on the integrated circuit industry, and designing high-performance chips has become the common goal of experts and engin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/26H03G3/02
Inventor 刘洋于奇杨帆孙明远
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com