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    • 9. 发明授权
    • Mixer with self-calibrating carrier leakage mechanism
    • 混合器具有自校准载体泄漏机制
    • US07603096B2
    • 2009-10-13
    • US11675688
    • 2007-02-16
    • Yuan-Hung ChungJie-Wei Lai
    • Yuan-Hung ChungJie-Wei Lai
    • H04B1/06H04B7/00
    • H03D7/1441H03D7/1458H03D2200/0033H03D2200/009
    • An embodiment of a mixer with carrier leakage self-calibrating is disclosed. The mixer comprises a double balanced mixer, a gm stage comprising a first processing unit and a second processing unit, a current duplicating circuit, a capacitor, a controller and a current compensation unit. The current duplicating circuit selects the first processing unit or the second processing unit and duplicates a duplicated current of the selected processing unit to charge the capacitor. The capacitor has a first terminal and a second terminal, wherein the second terminal is grounded and the first terminal receives the duplicated current. The controller determines a charge time of the capacitor to generate a compensation signal, wherein the charge time is the time that the voltage of the capacitor is charged to equal to a reference voltage. The current compensation unit receives the compensation signal to generate a compensation current to the mixer.
    • 公开了具有载波泄漏自校准的混频器的实施例。 混频器包括双平衡混频器,包括第一处理单元和第二处理单元的gm级,电流复制电路,电容器,控制器和电流补偿单元。 当前复制电路选择第一处理单元或第二处理单元,并复制所选择的处理单元的复制电流以对电容器充电。 电容器具有第一端子和第二端子,其中第二端子接地,第一端子接收复制的电流。 控制器确定电容器的充电时间以产生补偿信号,其中充电时间是将电容器的电压充电至等于参考电压的时间。 电流补偿单元接收补偿信号以产生到混频器的补偿电流。
    • 10. 发明申请
    • AMPLIFIER CIRCUIT HAVING STACKED MAIN AMPLIFIER AND PARALLEL SUB-AMPLIFIER
    • 具有堆叠主放大器和并联放大器的放大器电路
    • US20090189695A1
    • 2009-07-30
    • US12022159
    • 2008-01-30
    • Jie-Wei LaiMin Chen
    • Jie-Wei LaiMin Chen
    • H03F3/68
    • H03F1/223H03F1/26H03F1/3205H03F3/211H03F2200/294
    • An amplifier circuit for amplifying an input signal to generate an output signal is provided. The amplifier circuit has a stacked main amplifier, a parallel sub-amplifier, and a signal combiner. The stacked main amplifier includes a first amplifier unit for outputting a first amplified signal generated from processing the input signal; and a second amplifier unit for outputting a second amplified signal generated from processing the first amplified signal. The first amplifier unit and the second amplifier unit share bias current. The parallel sub-amplifier is coupled to the stacked main amplifier according to a parallel connection fashion, and outputs a third amplified signal generated from processing the input signal. The signal combiner combines the second amplified signal and the third amplified signal to generate the output signal.
    • 提供了用于放大输入信号以产生输出信号的放大器电路。 放大器电路具有堆叠的主放大器,并联子放大器和信号组合器。 堆叠的主放大器包括:第一放大器单元,用于输出从处理输入信号产生的第一放大信号; 以及第二放大器单元,用于输出从处理第一放大信号产生的第二放大信号。 第一放大器单元和第二放大器单元共享偏置电流。 并联子放大器根据并联连接方式耦合到堆叠的主放大器,并且输出从处理输入信号产生的第三放大信号。 信号组合器组合第二放大信号和第三放大信号以产生输出信号。