公开(公告)号：US20180331656A1

公开(公告)日：2018-11-15

申请号：US15776780

申请日：2016-01-29

Applicant: SOUTHEAST UNIVERSITY

Inventor： Chao CHEN ,  Jianhui WU ,  Hong LI ,  Cheng HUANG ,  Meng ZHANG

IPC: H03D7/14

CPC classification number: H03D7/1491 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/16

Abstract: A self-reconfigurable returnable mixer includes a self-reconfigurable transconductance stage. The input RF voltage signal is converted into RF current through the self-reconfigurable transconductance stage. The RF current is converted into an IF signal through down-conversion and low-pass filtering. The IF signal is fed back to the reconfigurable transconductance stage; the self-reconfigurable transconductance stage presents an open-loop structure to the input RF voltage signal, and the self-reconfigurable transconductance stage presents the topology structure of the negative feedback amplifier to the fed-back IF signal. The self-reconfigurable transconductance stage circuit achieves a high-linearity IF gain while providing a high bandwidth for the RF signal, effectively alleviating the contradiction between the conversion gain and the IF linearity in the conventional returnable structure.