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    Multi-band mixer and quadrature signal generator for a multi-mode radio receiver
    1.
    发明授权
    Multi-band mixer and quadrature signal generator for a multi-mode radio receiver 有权
    用于多模式无线电接收机的多频带混频器和正交信号发生器

    公开(公告)号：US07392026B2

    公开(公告)日：2008-06-24

    申请号：US11098490

    申请日：2005-04-04

    申请人： Mohammed S. Alam ,  Daniel L. Kaczman

    发明人： Mohammed S. Alam ,  Daniel L. Kaczman

    IPC分类号： H04B1/06

    CPC分类号： H04B1/0082 ,  H04B1/0057 ,  H04B1/30

    摘要： A multi-band high gain mixer and quadrature signal generator allows a receiver system to receive signals at multiple frequency bands without requiring significant hardware duplication. A single mixer directly receives any of three communication frequency bands such as Universal Mobile Telecommunication System (UMTS), Personal Communication Services (PCS), Digital Communication System (DCS), and Japan and US W-CDMA 800 bands without amplification. A Serial-Parallel Interface selectably forwards RF signals within the receiver's frequency channels to the mixer for demodulation into in-phase (I) and quadrature (Q) signals at a common IF output from the multi-mode receiver. Significant power and cost advantages are attained by elimination of duplicate mixers and amplifier stages.

    摘要翻译： 多频带高增益混频器和正交信号发生器允许接收机系统以多个频带接收信号，而不需要显着的硬件复制。 单个混频器直接接收诸如通用移动电信系统（UMTS），个人通信服务（PCS），数字通信系统（DCS），日本和美国的W-CDMA 800频带的三个通信频带中的任何一个，无需放大。 串行并行接口可选择地将接收机频率信道内的RF信号转发到混频器，以在多模接收机的公共IF输出端解调成同相（I）和正交（Q）信号。 通过消除重复的混频器和放大器级可以实现显着的功率和成本优势。

    HIGH PERFORMANCE CMOS RADIO FREQUENCY RECEIVER
    2.
    发明申请
    HIGH PERFORMANCE CMOS RADIO FREQUENCY RECEIVER 有权
    高性能CMOS无线电频率接收器

    公开(公告)号：US20090191833A1

    公开(公告)日：2009-07-30

    申请号：US12021534

    申请日：2008-01-29

    申请人： Daniel L. Kaczman ,  Mohammed S. Alam ,  David L. Cashen ,  Lu M. Han ,  Mohammed Rachedine ,  Manish N. Shah

    发明人： Daniel L. Kaczman ,  Mohammed S. Alam ,  David L. Cashen ,  Lu M. Han ,  Mohammed Rachedine ,  Manish N. Shah

    IPC分类号： H04B1/10

    CPC分类号： H04B1/30 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03F1/301 ,  H03F3/195 ,  H03F3/211 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45659 ,  H03F2200/294 ,  H03F2200/411 ,  H03F2203/45316 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45512 ,  H03F2203/45526 ,  H03F2203/45681 ,  H03F2203/45682 ,  H03K3/35625

    摘要： A high performance radio frequency receiver includes a low noise amplifier with large binary and stepped gain control range, controlled impedance, and enhanced blocker immunity, for amplifying and converting a radio frequency signal to a current; a pulse generator for generating in-phase and quadrature pulses; a crossover correction circuit and pulse shaper for controlling a crossover threshold of the pulses and interaction between in-phase and quadrature mixers; and a double balanced mixer for combining the RF signal with the pulses to generate an intermediate frequency or baseband zero intermediate frequency current-mode signal. The in-phase and quadrature pulses have a duty cycle of 20-35%. The intermediate frequency signal and second order harmonics may be filtered with a high frequency low pass filter and a current injected complex direct-coupled filter. Decreased die size, current drain, cost, and complexity, as well as improvements in gain, 1/f noise, noise figure, sensitivity, and linearity may result.

    摘要翻译： 高性能射频接收机包括具有大二进制和阶梯增益控制范围的低噪声放大器，受控阻抗和增强的阻塞抗扰度，用于放大和转换射频信号到电流; 用于产生同相和正交脉冲的脉冲发生器; 交叉校正电路和脉冲整形器，用于控制脉冲的交叉阈值以及同相和正交混频器之间的相互作用; 以及用于将RF信号与脉冲组合以产生中频或基带零中频频率电流模式信号的双平衡混频器。 同相和正交脉冲的占空比为20-35％。 中频信号和二次谐波可以用高频低通滤波器和注入电流的复合直流滤波器进行滤波。 降低管芯尺寸，电流消耗，成本和复杂性，以及增益，1 / f噪声，噪声系数，灵敏度和线性度的改善。