A 76-dBm IIP2 down-conversion mixer for TD-SCDMA/RFID applications

Authors:
Ying-Dan Jiang;Run-Xi Zhang;Chun-Qi Shi;Zong-Sheng Lai
Affiliations:
No. 58 Institute of China Electronic Technology Corporation, Wuxi, China;Institute of Microelectronics Circuit and System, East China Normal University, Shanghai, China;Institute of Microelectronics Circuit and System, East China Normal University, Shanghai, China;Institute of Microelectronics Circuit and System, East China Normal University, Shanghai, China
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2012

Citing 2
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RF microelectronics

RF microelectronics
A high IIP2Gilbert mixer-based downconverter design for direct-conversion WiMAX receivers

RWS'10 Proceedings of the 2010 IEEE conference on Radio and wireless symposium

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Abstract

This paper presents a semi-active in-phase/quadrature inductor-less down-conversion mixer. The mixer consists of an active trans-conductance stage, a passive current switching stage, and a trans-impedance stage. A complementary input architecture has been used to increase the trans-conductance for a given bias current. An on-chip prescaler is added to provide the balanced LO signals, while the CMFB circuit in trans-conductance stage is designed to enhance linearity. The chip was achieved in a 0.13 μm CMOS technology. It features 5 dB conversion gain over a broad range from 800 MHz to 2.1 GHz, which supports Chinese TD-SCDMA/RFID standards simultaneously. The maximum IIP2 is +76 dBm at 2.1 GHz and suitable for application within a direct-conversion receiver.