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    • 3. 发明申请
    • Frequency converter
    • 频率转换器
    • US20050140402A1
    • 2005-06-30
    • US10866458
    • 2004-06-10
    • Jin SungSung KangJung HwangChang HyoungYun Kim
    • Jin SungSung KangJung HwangChang HyoungYun Kim
    • H04B1/26H03D7/14H04B1/40
    • H03D7/1441H03D7/1408H03D7/1433H03D7/1458H03D7/1475H03D7/1483H03D2200/0047
    • Provided is a frequency converter that can remove a DC offset and suppress spurious response and intermodulation. The frequency converter receives a reference signal and a local oscillator signal and outputs a frequency component corresponding to the sum or difference of the reference signal and the even-order harmonics of local oscillator signal. The frequency converter includes a reference signal input part including a pair of MOS transistors connected in a differential amplifier form, which have gates to which positive and negative reference signals having a differential phase difference therebetween are respectively input, and first, second, third and fourth frequency conversion parts each of which is connected to the reference signal input part and includes a pair of MOS transistors. Local oscillator signals having a differential phase difference therebetween are input to the gates of the MOS transistors of the first and second frequency conversion parts. Local oscillator signals, which have phases orthogonal to phases of the local oscillator signals input to the first and second frequency conversion parts, are input to the gates of the MOS transistors of the third and fourth frequency conversion parts.
    • 提供了可以去除DC偏移并抑制寄生响应和互调的变频器。 频率转换器接收参考信号和本地振荡器信号,并输出与基准信号的和或差和本地振荡器信号的偶次谐波相对应的频率分量。 频率转换器包括:参考信号输入部分,包括以差分放大器形式连接的一对MOS晶体管,其具有分别输入有差分相位差的正和负参考信号的栅极,第一,第二,第三和第四 频率转换部分连接到参考信号输入部分并且包括一对MOS晶体管。 具有差分相位差的本地振荡器信号被输入到第一和第二变频部分的MOS晶体管的栅极。 具有与输入到第一和第二频率转换部分的本地振荡器信号的相位正交的相位的本地振荡器信号被输入到第三和第四变频部分的MOS晶体管的栅极。