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A Gilbert Upmixer for LTE MTC Power IoT

A technology of power Internet of things and mixers, applied in the direction of modulation conversion, electrical components, transmission systems, etc. of semiconductor devices with at least two electrodes, can solve the problems of reducing feedthrough of mixers on Gilbert, and achieve improved Isolation, the effect of improving port isolation

Active Publication Date: 2022-04-15
SOUTHEAST UNIV +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a Gilbert up-mixer applied to the LTE MTC power Internet of Things, and solve how to reduce the feeder from the local oscillator of the Gilbert up-mixer to the input terminal. common problem

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  • A Gilbert Upmixer for LTE MTC Power IoT
  • A Gilbert Upmixer for LTE MTC Power IoT

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Embodiment Construction

[0018] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0019] The present invention designs a Gilbert up-mixer applied to the LTE MTC power Internet of Things, including: a transconductance stage, which is used to convert an input intermediate frequency voltage signal into a current signal; a switch stage, which is used to alternate through the local oscillator signal. Control the conduction and cut-off of the switching tube; the load stage is used to convert the up-mixed current signal into a voltage signal output; the two filter capacitors connected to the transconductance stage are used to filter out the leakage of the local oscillator signal to the transconductance level signal.

[0020] The circuit structure of a Gilbert up-mixer given in this embodiment is as follows: figure 1 As shown, it includes a tail current tube M0, a first amplifier tube M1 and a second amplifier tube M2, a third switch tube M3, a fourth...

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Abstract

The invention discloses a Gilbert up-mixer applied to the LTE MTC power Internet of Things, which belongs to the technical field of wireless communication transmitters, and includes: a transconductance stage for converting an input intermediate frequency voltage signal into a current signal; a switch stage , used to alternately control the conduction and cut-off of the switch tube through the local oscillator signal; the load stage is used to convert the current signal after the up-mixing into a voltage signal output; two filter capacitors connected to the transconductance stage are used to filter In addition to the signal leakage of the local oscillator signal to the transconductance stage. The two filter capacitors are selected so that the transmission bandwidth of the transconductance stage is twice that of the intermediate frequency voltage signal. The present invention only adds two filter capacitors to the ground on the transconductance stage of the Gilbert upper mixer, so that the signal transmission bandwidth at the drain of the transconductance stage is changed, and the signal fed through the local oscillator to the input terminal can be filtered out. Improve port isolation without affecting the transmission of intermediate frequency signals and other performances of the circuit.

Description

technical field [0001] The invention relates to a Gilbert up-mixer applied to the LTE MTC power Internet of Things, and belongs to the technical field of wireless communication transmitters. Background technique [0002] In the wireless communication transmission system, the up-mixer is a key module. The Gilbert mixer is a widely used up-mixer structure. Compared with the passive mixer, the Gilbert mixer has a quiescent operating current and thus has a larger conversion gain. Due to the fully differential structure of an ideal Gilbert mixer, the differential local oscillator signal will be completely canceled at the drain of the switch tube, so that the structure has a theoretically good isolation. But in fact, due to the non-ideality of the local oscillator signal, the parasitic parameters of the transistor, and the process deviation, the local oscillator signal of the Gilbert up-mixer will still cause signal feedthrough and interference, especially the feedthrough to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03D7/12H04B1/04
CPCH03D7/12H04B1/04
Inventor 樊祥宁陶健李铮朱红冯景陈鑫邵瑾韦磊花再军廖一龙杨季周春良陆忞邵明驰
Owner SOUTHEAST UNIV
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