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利用0.35μm CMOS工艺实现了一种用于低中频接收机的Gilbert型下变频器、其中,混频器的输出级采用折叠级联输出,射频信号、本振信号和中频信号的频率分别为2.452GHz,2.45GHz和2MHz.测试表明:在3.3V电源电压条件下,整个混频器电路消耗的电流约为4mA,转换增益超过6dB,输入1dB压缩点约为-11dB。