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Broadband up-conversion mixer

A mixer and broadband technology, applied in the field of microelectronics, can solve problems such as local oscillator leakage, and achieve the effect of increasing the working bandwidth, improving the signal-to-noise ratio, and stabilizing the working state

Active Publication Date: 2022-02-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a broadband up-conversion mixer for the deficiencies of the prior art, which can effectively improve the signal-to-noise ratio and linearity of the mixer, and at the same time solve the problem of local oscillator caused by DC offset leaked problem

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Embodiment Construction

[0040] Below in conjunction with embodiment, the present invention is further described, but does not constitute any restriction to the present invention, anyone makes the limited number of amendments in the scope of claims of the present invention, still within the scope of claims of the present invention.

[0041] refer to figure 1 , a broadband up-conversion mixer of the present invention, comprising:

[0042] The frequency mixing module is used to linearly transform the input voltage into a target current after non-destructive processing, and to form a baseband signal after performing scaling and matching processing on the target current. The signal-to-noise ratio and linearity of the mixer can be effectively improved by performing lossless processing on the input voltage and scaling and matching the baseband signal obtained, and at the same time solving the problem of local oscillator leakage caused by DC offset.

[0043] After the frequency mixing module obtains the bas...

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Abstract

The invention discloses a broadband up-conversion mixer, relates to a microelectronic technology, and solves the technical problem that the linearity of an existing up-conversion mixer is deteriorated along with the increase of the amplitude of an input signal. The broadband up-conversion mixer comprises a frequency mixing module which is used for linearly converting an input voltage into a target current after lossless processing, and forming a baseband signal after scaling matching processing is carried out on the target current; modulating the baseband signal to a radio frequency band; and a balun module which is used for converting the modulated baseband signal into output voltage and also converting double-end output into single-end output. According to the invention, the signal-to-noise ratio and the linearity of the mixer can be effectively improved, and the problem of local oscillation leakage caused by direct-current imbalance is also solved; and the working state is more stable, the power consumption of the circuit is smaller, and the working bandwidth is wider.

Description

technical field [0001] The present invention relates to microelectronics technology, and more specifically, it relates to a wideband up-conversion mixer. Background technique [0002] With the wide application of wireless communication, communication technology is developing towards the trend of being compatible with multiple communication standards and satisfying multiple frequency bands, and the RF transceiver is also developing in the direction of multi-band and multi-standard, which puts higher demands on the working bandwidth of RF transceivers. high demands. In addition, in order to meet the requirements of high data transmission rates, more advanced frequency modulation techniques are required, which require high linearity in RF transceivers. The RF front-end is an extremely important part of the RF transceiver system, and the mixer, as a key module of the RF front-end, plays a vital role in the RF front-end, and its performance directly affects the performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/14H03D7/16
CPCH03D7/1441H03D7/16
Inventor 陈志坚洪月凤徐玉芬王日炎李斌
Owner SOUTH CHINA UNIV OF TECH