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�������պ����ѧѧ�� 2009, Vol. 35 Issue (4) :480-484    DOI:
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Ultra-low voltage ultra-low power NMOS bulk-biased mixer
Song Dan, Zhang Xiaolin*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ʹ������NMOS�ܺͳĵ�ƫ�ü���,����SMIC 0.18�Kμm CMOS����,Ϊ���ǵ���˫ϵͳ���ݽ��ջ�����Ƶ���ɵ�·оƬ�����һ�ֳ���ѹ�����ͺ�NMOS�ĵ�ƫ�û�Ƶ��(NBBM,NMOS Bulk-Biased Mixer).�����е�GPSϵͳΪ��:��Ƶ�źš������źź���Ƶ�źŷֱ�Ϊ1�K575.42�KMHz,1�K570�KMHz��5.42�KMHz.���Ա���:��1�KV��Դ��ѹ��,������ָ����迹1�K000�KΩʱ,��Ƶ�����ĵ���ԼΪ1.37�KmA,��Ƶ����( GC )����2.11�KdB,����1�KdBѹ����( P in-1�KdB)ԼΪ-13�KdBm;�������˷�����,��Ƶ����ɳ���14�KdB,����������ԶȵĽ��͡������Լ����������.
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Abstract�� By using two pairs of NMOSs and the bulk-biased technology, an ultra-low voltage ultra-low power NMOS bulk-biased mixer (NBBM), applied to some satellite navigation dual-system compatible receiver, was implemented in SMIC 0.18 �Kμm CMOS process. The GPS system was included: the frequency of the radio frequency (RF) signal, local oscillator (LO) signal and the intermediate frequency (IF) signal is ��1�K575.42�KMHz��, 1�K570�KMHz and 5.42�KMHz, respectively. Measurement results show that the circuit with the resistive 1�K000�KΩ termination consumes approximate 1.37�KmA under the supply voltage of 1�KV, the conversion gain ( GC ) is higher than 2.11�KdB, and the input 1�KdB compression point ( P in-1�KdB) is about -13dBm. For the mixer including operational amplifiers GC can rise to more than 14dB, which comes along with the worse linearity, more power consumption and larger area.
Keywords�� CMOS integrated circuits   radio receivers   mixers   navigation   power supply   ultra-low voltage   ultra-low power   bulk-biased     
Received 2008-04-22;
Fund:

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About author: �� ��(1983-),Ů,����������,��ʿ��,buaasd@ee.buaa.edu.cn.
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�� ��, ������.һ�ֳ���ѹ���ͺ�NMOS�ĵ�ƫ�û�Ƶ��[J]  �������պ����ѧѧ��, 2009,V35(4): 480-484
Song Dan, Zhang Xiaolin.Ultra-low voltage ultra-low power NMOS bulk-biased mixer[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(4): 480-484
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