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    • 3. 发明申请
    • DISCRETE TIME RECEIVER
    • 离职时间接收器
    • WO2010078276A1
    • 2010-07-08
    • PCT/US2009/069618
    • 2009-12-28
    • QUALCOMM IncorporatedBURKE, Joseph PatrickPAN, ChengzhiFAGG, Russell John
    • BURKE, Joseph PatrickPAN, ChengzhiFAGG, Russell John
    • H04B1/28H03D7/12
    • H04B1/28
    • A discrete time receiver includes a low noise transconductance amplifier (LNTA), a discrete time sampler, a passive discrete time circuit, and a switched capacitor amplifier. The LNTA amplifies a received RF signal and provides an amplified RF signal. The discrete time sampler samples the amplified RF signal (e.g., with multiple phases of a sampling clock) and provides first analog samples. The passive discrete time circuit decimates and filters the first analog samples and provides second analog samples. The switched capacitor amplifier amplifies the second analog samples and provides third analog samples. The discrete time receiver may further include a second passive discrete time circuit, a second switched capacitor amplifier, and an analog-to-digital converter (ADC) that digitizes baseband analog samples and provides digital samples. The discrete time receiver can flexibly support different system bandwidths and center frequencies.
    • 离散时间接收器包括低噪声跨导放大器(LNTA),离散时间采样器,无源离散时间电路和开关电容放大器。 LNTA放大接收的RF信号并提供放大的RF信号。 离散时间采样器对放大的RF信号(例如,采样时钟的多个相位)进行采样并提供第一模拟采样。 无源离散时间电路对第一个模拟采样进行抽取和滤波,并提供第二个模拟采样。 开关电容放大器放大第二模拟采样并提供第三模拟采样。 离散时间接收机可以进一步包括第二无源离散时间电路,第二开关电容放大器以及对基带模拟采样进行数字化并提供数字样本的模数转换器(ADC)。 离散时间接收器可以灵活地支持不同的系统带宽和中心频率。
    • 6. 发明申请
    • CURRENT BUFFER
    • 当前缓冲区
    • WO2012158431A1
    • 2012-11-22
    • PCT/US2012/037134
    • 2012-05-09
    • QUALCOMM INCORPORATEDKIM, NamsooBURKE, Joseph Patrick
    • KIM, NamsooBURKE, Joseph Patrick
    • H03F1/22H03F3/45
    • H03F3/45659H03F3/45179H03F2203/45306H03F2203/45521H03F2203/45612
    • A current filtering current buffer amplifier includes: a first port and a second input port configured to be coupled to and receive input current; a first output port and a second output port configured to be coupled to and provide current to a load; a buffer configured to transfer the received input current to the first and second output ports as an output current, the buffer having an input impedance and an output impedance where the output impedance is higher than the input impedance, the buffer including first and second amplifiers, the first amplifier being a common mode feedback amplifier; and a filter coupled to the first and second input ports and coupled to the first and second amplifiers, the filter having a complex impedance and being configured to notch filter the received input current.
    • 电流滤波电流缓冲放大器包括:第一端口和第二输入端口,被配置为耦合到并接收输入电流; 第一输出端口和第二输出端口,被配置为耦合到负载并且向负载提供电流; 缓冲器,被配置为将接收到的输入电流传送到第一和第二输出端口作为输出电流,该缓冲器具有输入阻抗和输出阻抗,其中输出阻抗高于输入阻抗,该缓冲器包括第一和第二放大器, 第一放大器是共模反馈放大器; 以及耦合到所述第一和第二输入端口并耦合到所述第一和第二放大器的滤波器,所述滤波器具有复阻抗并被配置为陷波滤波所接收的输入电流。