Method capable of improving low-frequency flicker noise and high-gain characteristic and active mixer

A mixer and characteristic technology, applied in the direction of the balance device of modulation transformation, etc., can solve the problems of not being able to effectively improve the performance of the mixer, affecting the gain, etc.

Inactive Publication Date: 2013-07-03
NATIONZ TECH INC
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual design, it is found that these methods of improving noise performance will affect other performances such as gain and linearity, and cannot effectively improve the performance of the mixer, especially the 1/f noise performance. The traditio

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
  • Method capable of improving low-frequency flicker noise and high-gain characteristic and active mixer
  • Method capable of improving low-frequency flicker noise and high-gain characteristic and active mixer
  • Method capable of improving low-frequency flicker noise and high-gain characteristic and active mixer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] In order to make the purpose, technical solution and beneficial effect of the invention clearer, the specific implementation manner of the invention will be described in detail below in conjunction with the accompanying drawings.

[0048] Compared with the traditional Gilbert active mixer described in the background art, the flicker noise of the switching tube can be reduced, the gain can be improved, and at the same time, it is convenient for low-voltage implementation.

[0049] The technique for achieving the above-mentioned purpose of the present invention is mainly to reduce the flicker noise of the mixer by reducing the current flowing through the switch tube, and at the same time use the current to generate the input transconductance, which is beneficial to increase the gain and further improve the noise performance of the mixer .

[0050] A low flicker noise, high gain Gilbert active mixer provided by the present invention will be described in detail below with s...

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 an active mixer with low-frequency flicker noise and a high-gain characteristic. In the prior art, a traditional Gilbert active mixer has the problems that flicker noise is loud, and compromise of noise and gain exists, so that the traditional Gilbert active mixer cannot meet the requirement of a present receiver to a high-performance mixer, especially to zero intermediate frequency receivers and low intermediate frequency receivers. Aiming at the defects, the active mixer with low-frequency flicker noise and the high-gain characteristic reduces the mixer flicker noise by reducing direct current which flows through a traditional Gilbert active mixer switch pipe, and by the adoption of input transconductance generated by the current, the contradictory problem that the flicker noise and the gain exist in traditional active mixer performance optimization is solved, so that the high-performance active mixer which is low in flicker noise and high in gain is achieved.

Description

technical field [0001] The invention relates to the field of frequency mixing, in particular to an active mixer with low flicker noise (1 / f noise) and high gain performance. Background technique [0002] The demand for portable wireless communication systems such as wireless local area network (LAN), wireless multimedia and home wireless control systems has grown significantly in recent years. With the scaling down of CMOS process feature size and the continuous improvement of circuit technology, more and more high-performance, highly integrated radio frequency chips (RFICs) have emerged, and these chips have been widely used. [0003] The receiver architecture mainly includes three architectures: superheterodyne, zero-IF, and low-IF. Now, with technological progress and integration requirements, the most mainstream receiver architecture is zero-IF architecture. figure 1 Represents a general zero-IF receiver block diagram. The zero-IF receiver is also called a direct-conv...

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
IPC IPC(8): H03D7/14
Inventor 蔡新午张立国赵骞潘文杰周建波
Owner NATIONZ TECH INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap