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�������պ����ѧѧ�� 2008, Vol. 34 Issue (12) :1452-1455    DOI:
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�� ��, ������, ���²�*
�������պ����ѧ ������Ϣ����ѧԺ, ���� 100191
Design of low voltage CMOS folded-cascode mixer
Song Dan, Zhang Xiaolin, Xia Wenbo*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ����SMIC 0.18��μm��CMOS����,����һ���۵���Դ��դ�ṹ,���ʵ����һ�ֵ�ѹCMOS�۵���Դ��դ��Ƶ��,����˴�ͳGilbert��Ƶ���п絼���뿪�ؼ��ѵ������ĸߵ�Դ��ѹ����,�Լ��ڿ絼���ĸ߿絼���������뿪�ؼ��ĵ����������������Ƶ�����.�û�Ƶ�����ĵ�·�ߴ�Ϊ165��μm×75��μm,����Ƶ�źš������źź���Ƶ�źŷֱ�Ϊ��1��575.42��MHz����1��570��MHz��5.42��MHzʱ,�������:�û�Ƶ��ת������( GC )Ϊ15��dB,˫�ߴ�����ϵ��Ϊ12.5��dB,�������׽ضϵ�Ϊ-0.4��dBm,��1.2��V�ĵ�Դ��ѹ������,����Ϊ3.8��mW,�����ں��պ�������ĵ���ϵͳ��.
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Abstract�� By using the folded-cascode structure, the problem on high supply voltage of the stacking trans-conductance stage and switching-transistor stage was solved, and the trade-off among the high trans-conductance, high linearity of the trans-conductance stage and the low noise of the switching-transistor stage were also realized. Implemented in a SMIC 0.18��μm CMOS process, the low-voltage complementary metal-oxide semiconductor (CMOS) folded-cascode mixer (FCM) core has an area of 165��μm×75��μm. When the frequency of the radio frequency (RF) signal, local oscillator (LO) signal and the intermediate frequency (IF) signal are 1��575.42��MHz, 1��570��MHz and 5.42��MHz, respectively, the simulation results show that the mixer features a conversion gain ( GC ) of 15��dB, a dual sideband (DSB) noise figure of 12.5��dB, a third-order input intercept point (IIP3) of -0.4��dBm, and consumes 3.8��mW at a power supply voltage of 1.2��V. The mixer can be applied to the electronic systems within the realm of the aviation aerospace.
Keywords�� CMOS integrated circuits   radio receivers   mixers   navigation   power supply   low-voltage   folded-cascode     
Received 2007-12-27;


About author: �� ��(1983-),Ů,����������,��ʿ��,buaasd@ee.buaa.edu.cn.
�� ��, ������, ���²�.��ѹCMOS�۵���Դ��դ��Ƶ�������[J]  �������պ����ѧѧ��, 2008,V34(12): 1452-1455
Song Dan, Zhang Xiaolin, Xia Wenbo .Design of low voltage CMOS folded-cascode mixer[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(12): 1452-1455
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