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    • 3. 发明申请
    • VARIABLE GAIN MIXER
    • 可变增益混合器
    • WO2007004816A1
    • 2007-01-11
    • PCT/KR2006/002555
    • 2006-06-30
    • FCI INCBECK, Sungho
    • BECK, Sungho
    • H03D7/10
    • H03D7/12H03D7/1433H03D7/1458H03D2200/0019H03D2200/0025H03D2200/0027H03D2200/0043H03D2200/0088
    • There is provided a variable gain mixer capable of controlling a gain at a low source voltage in a wide range without additional current consumption. The mixer includes: mixers constructed with variable gain amplifiers having two transistor pairs Qp+/Qp- and Qn+/Qn- to have a predetermined gain by using LO+ and LO- signals; and LO bias circuits connected to have bias voltages different from each other with respect to the LO+ and LO signals of the mixers and share an input signal. Accordingly, by integrating the variable gain amplifiers into the mixers, a gain change can be obtained at a low source voltage in a wide range without connecting a number of variable gain amplifiers. In addition, by properly applying the LO signals used in the mixers, the gain change can have a linearity in dB characteristic
    • 提供了一种可变增益混频器,其能够在宽范围内控制低电源电压下的增益,而无需额外的电流消耗。 混频器包括:由具有两个晶体管对Qp + / Qp-和Qn + / Qn-的可变增益放大器构成的混频器通过使用LO +和LO-信号具有预定的增益; 并且LO偏置电路被连接以相对于混频器的LO +和LO信号彼此不同的偏置电压并且共享输入信号。 因此,通过将可变增益放大器集成到混频器中,可以在宽范围内的低电源电压下获得增益变化,而不连接多个可变增益放大器。 另外,通过适当地应用混频器中使用的LO信号,增益变化可以具有dB特性的线性度