Design of a novel mixer with high gain and linearity improvement for DRM/DAB applications  

作　　者：吴毅强 王志功 徐建 王剑 张欧力 唐路 

机构地区：[1]Institution of RF- & OE-ICs,Southeast University

出　　处：《Journal of Semiconductors》2013年第1期89-93,共5页半导体学报（英文版）

基　　金：Project supported by the Innovation Fund of the Ministry of Science & Technology for Small and Medium Scale Enterprises (No.11c26213211234);the National Natural Science Foundation of China (No.61106024);the Specialized Research Fund for the Doc-toral Program of Higher Education,China (No.20090092120012)

摘　　要：This paper focuses on a new design of a down-conversion mixer for a low-IF wideband receiver.Based on the folded structure and differential multiple gated transistor（DMGTR） technique,a novel quadrature mixer with a high conversion gain,a moderate linearity,and a moderate NF is proposed.The mixer is designed and implemented in a 0.18-m CMOS process,and can operate in a frequency range from 150 kHz to 1.5 GHz.The circuit performance is confirmed by both simulation and measurement results.The measurement results exhibit a peak conversion gain of 13.35 dB,a high third order input referred intercept point of 14.85 dBm,and a moderate single side band noise figure of 10.67 dB.Moreover,the whole quadrature mixer core occupies a compact die area of 0.122 mm2.It consumes a current of 3.96 mA（excluding the output buffers） under a single supply voltage of 1.8 V.This paper focuses on a new design of a down-conversion mixer for a low-IF wideband receiver.Based on the folded structure and differential multiple gated transistor（DMGTR） technique,a novel quadrature mixer with a high conversion gain,a moderate linearity,and a moderate NF is proposed.The mixer is designed and implemented in a 0.18-m CMOS process,and can operate in a frequency range from 150 kHz to 1.5 GHz.The circuit performance is confirmed by both simulation and measurement results.The measurement results exhibit a peak conversion gain of 13.35 dB,a high third order input referred intercept point of 14.85 dBm,and a moderate single side band noise figure of 10.67 dB.Moreover,the whole quadrature mixer core occupies a compact die area of 0.122 mm2.It consumes a current of 3.96 mA（excluding the output buffers） under a single supply voltage of 1.8 V.

关 键 词：down-conversion mixer folded structure DMGTR high gain low NF 

分 类 号：TN773[电子电信—电路与系统] TP212[自动化与计算机技术—检测技术与自动化装置]