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S-band high-linearity, low-noise and low-gain down-conversion active mixer

A high-linearity, low-noise technology, used in DC-coupled DC amplifiers, improved amplifiers to reduce noise effects, modulation and transformation of semiconductor devices with at least two electrodes, etc. Power consumption and other issues, to achieve the effect of improving linearity and noise performance, low power consumption, and high linearity

Inactive Publication Date: 2015-04-15
CHENGDU AIJIELONG INFORMATION TECH
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Problems solved by technology

Linearity is generally measured by the value of the 1dB point of output compression, and the existing active mixers generally achieve the goal of increasing the 1dB point of output compression with a larger gain, and to suppress the size of the noise figure, but so The defect is also obvious, that is, the power consumption of the system is greatly increased, which is inconsistent with the design concept and development trend of the current wireless communication equipment, which tends to be miniaturized, low power consumption and high performance.

Method used

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  • S-band high-linearity, low-noise and low-gain down-conversion active mixer
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  • S-band high-linearity, low-noise and low-gain down-conversion active mixer

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0021] Transconductance stage circuit of the present invention such as figure 1 As shown, it consists of two transistors, which are used to complete the conversion of radio frequency voltage signal to current signal. A simplified transconductance stage input circuit analysis method is shown in formula (1):

[0022] IIP 3 = 4 3 | α 1 | | α 3 | = ...

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Abstract

The invention discloses an S-band high-linearity, low-noise and low-gain down-conversion active mixer. The structure of the mixer is based on a Gilbert-type unit. The invention further discloses a local oscillator drive circuit so as to provide a good local oscillator input signal and improve overall circuit performance. The mixer has the advantages of low power consumption, high linearity and low noise, and linearity and noise performance of the mixer are improved under the condition of low gain.

Description

technical field [0001] The invention relates to an S-band high-linearity, low-noise and low-gain down-conversion active mixer, relates to the design of a frequency conversion module circuit of a wireless transceiver system, and belongs to the technical field of wireless electronic communication. Background technique [0002] At present, in wireless communication, frequency conversion is essential. The receiver part needs to convert the radio frequency signal to low-medium frequency to realize signal processing and information extraction, and the transmitter part needs to convert the mid-low frequency signal to radio frequency signal to realize transmission. . The mixer is a module that realizes spectrum shifting. In the wireless transceiver system, the mixer occupies a very important position. The importance of mixer design is also reflected in another aspect. The linearity of the mixer determines the dynamic range of the transceiver system, and the noise figure of the mixe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/12H03F1/26H03F3/45H04B1/16
Inventor 万佳赵新强李栋谢李萍魏越
Owner CHENGDU AIJIELONG INFORMATION TECH
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