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    • 9. 发明申请
    • DC offset cancellation in a direct-conversion receiver
    • 直接转换接收机中的直流偏移消除
    • US20050110550A1
    • 2005-05-26
    • US10719833
    • 2003-11-24
    • Qian ShiLiang DaiKevin Wang
    • Qian ShiLiang DaiKevin Wang
    • H03D3/00H03F3/45H03L5/00
    • H03F3/45991H03D3/008H03F3/45973H03F2200/294H03F2200/372
    • The DCOC block is used in ZIF BB to form HPF function to cancel dc offset with a penalty of small silicon area and low power consumption. It is a LPF plus a voltage to current conversion (VIC) resistor, and can hook up with any BB opamp used in signal path, to form a feedback loop, with or without signal gain stages in the loop. The BB opamp is used as a summing point. The summing method is input current summing. The cutoff frequency of the HPF function is thus defined by the integrator, the VIC resistor, and the feedback resistor in the summing opamp. The presence of the VIC resistor can drastically reduce the integrator capacitor and resistor values and thus save silicon area or improve receiver performance.
    • 在ZIF BB中使用DCOC块形成HPF功能,以小的硅面积和低功耗的损失来消除直流偏移。 它是一个LPF加上电压 - 电流转换(VIC)电阻,并且可以连接在信号通路中使用的任何BB运算放大器,形成一个反馈回路,在回路中有或没有信号增益级。 BB运算符用作求和点。 求和方法为输入电流求和。 因此,HPF功能的截止频率由积分器,VIC电阻和求和运算放大器中的反馈电阻器定义。 VIC电阻的存在可以显着降低积分器电容和电阻值,从而节省硅面积或提高接收机性能。
    • 10. 发明申请
    • Multi-lamp actuating facility
    • 多灯驱动设备
    • US20050029967A1
    • 2005-02-10
    • US10936328
    • 2004-09-08
    • Mender ChenWoody ChanKevin Wang
    • Mender ChenWoody ChanKevin Wang
    • H05B41/282H05B41/392H05B37/00
    • H05B41/2824H05B41/392
    • A lamp actuating device includes a number of lamps each having an output terminal, an inverter circuit coupled to the lamps to energize the lamps, a low frequency control unit coupled to the inverter circuit, to set an average value for the level of the effective lamp current at the output terminals of the lamps and to control the inverter circuit, a number of current detecting devices coupled between the lamps and the low frequency control devices to obtain and send the average current value at the output terminals of the lamps to the low frequency control unit. A number of regulating devices are coupled between the lamps and the low frequency control unit, to maintain each lamp at the predetermined average value of the effective current.
    • 灯驱动装置包括多个灯,每个灯具有输出端子,反相器电路耦合到灯以激励灯,连接到逆变器电路的低频控制单元,以设置有效灯的电平的平均值 在灯的输出端子处的电流并控制逆变器电路,耦合在灯和低频控制装置之间的多个电流检测装置,以获得并将灯的输出端处的平均电流值发送到低频 控制单元 多个调节装置耦合在灯和低频控制单元之间,以将每个灯保持在有效电流的预定平均值。