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    • 6. 发明授权
    • Circuit and method for receiving and mixing radio frequencies in a direct conversion receiver
    • 在直接转换接收机中接收和混合射频的电路和方法
    • US07120414B2
    • 2006-10-10
    • US10816165
    • 2004-04-01
    • Young-Jin KimIn-Chul Hwang
    • Young-Jin KimIn-Chul Hwang
    • H04B1/26G01V3/02
    • H03D7/165H03D7/1433H03D7/1441H03D7/1458H03D7/1475H03D7/1491H03D2200/0043H03D2200/0047H03D2200/009H04B1/30
    • A frequency mixing circuit and a frequency mixing method. The frequency mixing circuit includes first and second differential amplifiers, a subtracter and a mixer. The first differential amplifier amplifies a first pair of input signals having a first frequency to generate a first differential signal. The second differential amplifier amplifies a second pair of input signals having the first frequency orthogonal to the first pair input signals to generate a second differential signal. The subtracter subtracts the second differential signal from the first differential signal. The mixer mixes the subtracted signal with a first and second pairs of drive signals having a second frequency orthogonal to each other, in a sub-harmonic double balanced mixing mode, so that the mixer generates a pair of output signals orthogonal to each other without secondary harmonics.
    • 一种混频电路和一种混频方法。 该混频电路包括第一和第二差分放大器,减法器和混频器。 第一差分放大器放大具有第一频率的第一对输入信号以产生第一差分信号。 第二差分放大器放大具有与第一对输入信号正交的第一频率的第二对输入信号,以产生第二差分信号。 减法器从第一差分信号中减去第二差分信号。 混频器将减法信号与亚谐波双平衡混合模式中的具有第二频率彼此正交的第一和第二对驱动信号进行混合,使得混频器产生彼此正交的一对输出信号,而没有次级 谐波。