Analysis and design of a 1.0-V CMOS mixer based on variable load technique

Authors:
Bao-Lin Wei;Yu-Jie Dai
Affiliations:
College of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;Institute of Microelectronics, Nankai University, Tianjin 300457, China
Venue:
Microelectronics Journal
Year:
2012

Citing 2
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A low-voltage high-linearity ultra-wideband down-conversion mixer in 0.18-µm CMOS technology

Microelectronics Journal

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Abstract

A CMOS active mixer based on variable load technique which can operate at 1.0V supply voltage is proposed and its operation principle, noise and linearity analysis are presented. Different from the conventional Gilbert mixer based on RF current-commutating, the proposed mixer controls the load impedance according to the LO signal. It has only two stacked transistors at each branch which is suitable for low-voltage applications. The mixer was fabricated in 0.18-@mm 1P6M CMOS process and measured in 2.4-GHz ISM band. With an input 2.440GHz RF signal and a 2.442GHz LO signal, the conversion gain is 5.3dB, the input-referred third-order intercept points is 4.6dBm, the input-referred 1dB compression point is -7.4dBm, and the single-sideband noise figure is 21.7dB. Total DC current consumption is 3.5mA.