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    • 1. 发明授权
    • Mixer circuit and radio communication device using the same
    • 混频器电路和无线通信设备使用相同
    • US08190117B2
    • 2012-05-29
    • US12207785
    • 2008-09-10
    • Toshiya MitomoOsamu Watanabe
    • Toshiya MitomoOsamu Watanabe
    • H04B1/26H04B1/28H01Q11/12
    • H03D7/1441H03D7/1458H03D7/165H03D2200/0047H03D2200/0084
    • A mixer circuit includes a voltage-to-current converter which converts a positive phase input voltage signal and a reversed phase input voltage signal input to a first input terminal and a second input terminal into a positive phase current signal and a reversed phase current signal, a switching circuit switches over the positive phase current signal and the reversed phase current signal according to a positive phase local signal and a reversed phase local signal, and generates a positive phase output current signal and a reversed phase output current signal, and an impedance element connected between the first common terminal and the second common terminal, having a relatively high impedance to a differential-mode signal between the positive phase current signal and the reversed phase current signal, and having a relatively low impedance to a common-mode signal between the positive phase current signal and the reversed phase current signal.
    • 混频器电路包括电压 - 电流转换器,其将输入到第一输入端子和第二输入端子的正相输入电压信号和反相输入电压信号转换为正相电流信号和反相电流信号, 开关电路根据正相本地信号和反相本地信号切换正相电流信号和反相电流信号,并产生正相输出电流信号和反相输出电流信号,以及阻抗元件 连接在第一公共端子和第二公共端子之间,对正相电流信号和反相电流信号之间的差分模式信号具有相对较高的阻抗,并且具有相对较低的阻抗, 正相电流信号和反相电流信号。
    • 2. 发明申请
    • FMWC SIGNAL GENERATOR AND RADAR APPARATUS USING FMCW SIGNAL GENERATOR
    • FMWC信号发生器和使用FMCW信号发生器的雷达设备
    • US20100073222A1
    • 2010-03-25
    • US12407817
    • 2009-03-20
    • Toshiya MitomoHiroaki HoshinoOsamu WatanabeShoji Otaka
    • Toshiya MitomoHiroaki HoshinoOsamu WatanabeShoji Otaka
    • G01S13/00
    • G01S13/345G01S7/35
    • An FMCW signal generator includes a frequency divider to divide the FMCW signal at a preset dividing ratio, a reference signal generator to periodically generate a reference signal at a second time interval not less than a loop time constant set for a PLL, a frequency of the reference signal being discretely swept within a range of fc±Δf (fc is a center frequency, and Δf is a frequency sweep width) at a first time interval not more than the loop time constant, a comparison unit to compare the frequency divided signal with the reference signal to generate a comparison result signal corresponding to a phase difference between the frequency divided signal and the reference signal, a loop filter to filter the comparison result signal to generate a control voltage signal, and a VCO to have an oscillation frequency thereof controlled by the control voltage signal.
    • FMCW信号发生器包括分频器,用于以预设的分频比对FMCW信号进行分频,参考信号发生器以不小于为PLL设置的环路时间常数的第二时间间隔周期性地产生参考信号,频率为 参考信号在fc±&Dgr的范围内离散地扫描; f(fc是中心频率,并且&Dgr; f是频率扫描宽度)在不大于循环时间常数的第一时间间隔,比较单元 具有参考信号的频率分频信号,以产生对应于分频信号和参考信号之间的相位差的比较结果信号;环路滤波器,用于对比较结果信号进行滤波以产生控制电压信号;以及VCO, 振荡频率由控制电压信号控制。
    • 3. 发明申请
    • MIXER CIRCUIT AND RADIO COMMUNICATION DEVICE USING THE SAME
    • 使用该混合器电路和无线电通信装置
    • US20090075619A1
    • 2009-03-19
    • US12207785
    • 2008-09-10
    • Toshiya MitomoOsamu Watanabe
    • Toshiya MitomoOsamu Watanabe
    • H04B1/16H03B19/00
    • H03D7/1441H03D7/1458H03D7/165H03D2200/0047H03D2200/0084
    • A mixer circuit includes a voltage-to-current converter which converts a positive phase input voltage signal and a reversed phase input voltage signal input to a first input terminal and a second input terminal into a positive phase current signal and a reversed phase current signal, a switching circuit switches over the positive phase current signal and the reversed phase current signal according to a positive phase local signal and a reversed phase local signal, and generates a positive phase output current signal and a reversed phase output current signal, and an impedance element connected between the first common terminal and the second common terminal, having a relatively high impedance to a differential-mode signal between the positive phase current signal and the reversed phase current signal, and having a relatively low impedance to a common-mode signal between the positive phase current signal and the reversed phase current signal.
    • 混频器电路包括电压 - 电流转换器,其将输入到第一输入端子和第二输入端子的正相输入电压信号和反相输入电压信号转换为正相电流信号和反相电流信号, 开关电路根据正相本地信号和反相本地信号切换正相电流信号和反相电流信号,并产生正相输出电流信号和反相输出电流信号,以及阻抗元件 连接在第一公共端子和第二公共端子之间,对正相电流信号和反相电流信号之间的差分模式信号具有相对较高的阻抗,并且具有相对较低的阻抗, 正相电流信号和反相电流信号。