Low-power-consumption broadband radio frequency mixer adopting multichannel feedback transconductance enhancement and common mode feedback active load

A technology of transconductance enhancement and active load, applied in the direction of modulation conversion balance device, etc., can solve the problems of narrow operating frequency band and high noise figure of the mixer, and achieve the expansion of operating frequency band bandwidth, large equivalent transconductance, and optimized noise factor effect

Active Publication Date: 2017-06-13
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to provide a low-power broadband radio frequency mixer using multi-channel feedback transconductance enhancement and common-mod

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  • Low-power-consumption broadband radio frequency mixer adopting multichannel feedback transconductance enhancement and common mode feedback active load
  • Low-power-consumption broadband radio frequency mixer adopting multichannel feedback transconductance enhancement and common mode feedback active load
  • Low-power-consumption broadband radio frequency mixer adopting multichannel feedback transconductance enhancement and common mode feedback active load

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[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The present invention provides a low-power broadband radio frequency mixer using multi-channel feedback transconductance stages and common-mode active feedback active loads to solve the problems of narrow operating frequency band and high noise figure of existing mixers , and further improve linearity and power performance. The transconductance stage of this design introduces two feedback paths. The first feedback improves the equivalent tr...

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Abstract

The invention discloses a low-power-consumption broadband radio frequency mixer adopting multichannel feedback transconductance enhancement and common mode feedback active load, in order to solve the problems of relatively narrow working band and relatively high noise coefficient of the existing mixer, and further improve the linearity and the power consumption performance. The mixer comprises a signal input stage (1) composed of resistors and capacitors, a transconductance stage (2) composed of a multichannel feedback dual transconductance enhancement structure, a switch stage (3) composed of symmetrical switch tubes and a load stage (4) composed of the common mode feedback active load. According to the low-power-consumption broadband radio frequency mixer disclosed by the invention, multichannel feedback is imported to the transconductance stage of the mixer to improve the conversion gain of the mixer, realize the compromise of the mixer gain and the input match, and expand the working band of the mixer. The multichannel feedback used in the low-power-consumption broadband radio frequency mixer disclosed by the invention also realizes noise cancelation and optimizes the noise performance of the mixer. According to the low-power-consumption broadband radio frequency mixer disclosed by the invention, the common mode feedback active load is used in the load stage to optimize the linearity performance of the mixer. The low-power-consumption broadband radio frequency mixer disclosed by the invention has the advantages of simple structure, easy realization and small occupation area.

Description

technical field [0001] The invention relates to a low-power broadband radio frequency mixer adopting multi-channel feedback transconductance enhancement and common-mode feedback active load, which has the characteristics of wide band, low noise figure and low power consumption, and belongs to the technical field of radio frequency integrated circuits. Background technique [0002] With the rapid development of personal communication technology and market, the requirements for communication capacity, speed and low power consumption are constantly increasing. A variety of communication protocols and standards are emerging, and communication equipment needs to be compatible with multiple communication standards, and can work in different frequency bands at the same time without causing performance degradation. In the radio frequency receiver, the main module circuit is the radio frequency receiving front end and the baseband processing circuit. The RF receiving front end plays...

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Application Information

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IPC IPC(8): H03D7/14
Inventor 闫旭杨璐张吉利林福江
Owner UNIV OF SCI & TECH OF CHINA
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