Method and apparatus to provide variable gain in a radio receiver front end
    31.
    发明授权
    Method and apparatus to provide variable gain in a radio receiver front end 有权
    在无线电接收机前端提供可变增益的方法和装置

    公开(公告)号:US07539471B2

    公开(公告)日:2009-05-26

    申请号:US11394798

    申请日:2006-03-30

    IPC分类号: H04B1/18 H04B1/28

    CPC分类号: H03G3/3052

    摘要: An RF receiver front end includes a variable gain low noise amplifier and/or a variable gain mixer to provide gain variability in the receiver. This gain variability may be used during, for example, automatic gain control operations. In at least one embodiment, the variable gain LNA is a broadband device that is capable of supporting multiple wireless standards.

    摘要翻译: RF接收机前端包括可变增益低噪声放大器和/或可变增益混频器,以在接收机中提供增益变化。 这种增益变化可以在例如自动增益控制操作期间使用。 在至少一个实施例中,可变增益LNA是能够支持多个无线标准的宽带设备。

    Method and apparatus to interleave bits across symbols from different constellations
    32.
    发明授权
    Method and apparatus to interleave bits across symbols from different constellations 失效
    用于在不同星座的符号之间交织比特的方法和装置

    公开(公告)号:US07539270B2

    公开(公告)日:2009-05-26

    申请号:US10954618

    申请日:2004-09-30

    申请人: Sumeet Sandhu

    发明人: Sumeet Sandhu

    IPC分类号: H04L27/36

    CPC分类号: H04L1/0071 H04L27/2608

    摘要: An encoded input bit stream is interleaved across a number of symbols having different bit sizes in a manner that ensures that the bits assigned to each symbol from the bit stream are separated by a minimum separation. In this manner, bits that are adjacent within the bit stream do not get assigned to the same symbol.

    摘要翻译: 编码的输入比特流以具有不同比特大小的多个符号交错,以确保从比特流分配给每个符号的比特被分离最小间隔。 以这种方式,在比特流内相邻的比特不被分配给相同的符号。

    Ad hoc mode of operation in wireless personal area networks
    33.
    发明授权
    Ad hoc mode of operation in wireless personal area networks 失效
    无线个人网络中的Ad hoc操作模式

    公开(公告)号:US07385958B2

    公开(公告)日:2008-06-10

    申请号:US10880629

    申请日:2004-06-30

    申请人: Mustafa Demirhan

    发明人: Mustafa Demirhan

    IPC分类号: H04Q7/24

    CPC分类号: H04W74/0808 H04W84/18

    摘要: Techniques and structures are provided to allow a wireless data device to operate within a wireless personal area network without the use of a centralized coordination function.

    摘要翻译: 提供技术和结构以允许无线数据设备在无线个人区域网络内操作而不使用集中协调功能。

    Low cost power amplifier linearization in an RFID radio transmit chain
    34.
    发明授权
    Low cost power amplifier linearization in an RFID radio transmit chain 失效
    RFID无线电传输链中的低成本功率放大器线性化

    公开(公告)号:US07304575B2

    公开(公告)日:2007-12-04

    申请号:US11142117

    申请日:2005-06-01

    IPC分类号: G08B13/14

    摘要: A power amplification system within an RFID reader uses feedback to linearize a transfer function of the system. ASK modulation is used in the system. An envelope of an output signal of a non-linear power amplifier is fed back to an input where it is combined in an integrator with an ASK modulation signal to generate a pre-emphasized modulation signal. The pre-emphasized modulation signal is then applied to the power amplifier to generate a linearized output signal.

    摘要翻译: RFID读取器内的功率放大系统使用反馈来线性化系统的传递功能。 在系统中使用ASK调制。 非线性功率放大器的输出信号的包络被反馈到输入,在该输入处,积分器与ASK调制信号组合以产生预先强调的调制信号。 然后将预先强调的调制信号施加到功率放大器以产生线性化的输出信号。

    Miniaturized planar microstrip balun
    36.
    发明授权
    Miniaturized planar microstrip balun 有权
    微型平面微带平衡 - 不平衡转换器

    公开(公告)号:US06998930B2

    公开(公告)日:2006-02-14

    申请号:US10880968

    申请日:2004-06-30

    IPC分类号: H01P5/10 H03H11/32

    CPC分类号: H01P5/10

    摘要: A miniaturized planar microstrip balun includes first and second microstrip coupling segments that are considerably shorter than a quarter of a guide wavelength (λg/4 ). In at least one embodiment, a microstrip balun is provided that does not require the use of lumped circuit elements or short circuit terminations.

    摘要翻译: 平板微型平板 - 不平衡变换器包括第一和第二微带耦合段,其比导向波长(λ/λ/ 4)的四分之一短得多。 在至少一个实施例中,提供了微带平衡 - 不平衡变换器,其不需要使用集总电路元件或短路端接。

    Slave-less edge-triggered flip-flop
    37.
    发明授权
    Slave-less edge-triggered flip-flop 有权
    无源边沿触发触发器

    公开(公告)号:US06956421B1

    公开(公告)日:2005-10-18

    申请号:US10616810

    申请日:2003-07-10

    申请人: Mark E. Schuelein

    发明人: Mark E. Schuelein

    IPC分类号: H03K3/012 H03K3/12 H03K3/356

    CPC分类号: H03K3/356156 H03K3/012

    摘要: An edge-triggered flip flop includes a clocking portion having first and second transistor stacks that are coupled to first and second storage nodes of a memory element, respectively. In at least one embodiment, a clock signal is applied to an input of at least one transistor in each stack and a delayed and possibly inverted version of the clock signal is applied to an input of at least one other transistor in each stack to clock new data into the memory element.

    摘要翻译: 边缘触发触发器包括具有分别耦合到存储元件的第一和第二存储节点的第一和第二晶体管堆叠的时钟部分。 在至少一个实施例中,时钟信号被施加到每个堆叠中的至少一个晶体管的输入,并且时钟信号的延迟和可能的反转版本被施加到每个堆叠中的至少一个其他晶体管的输入以对新的时钟 数据进入存储元件。

    Digitally tuned, integrated baluns with enhanced linearity for multi-band radio applications
    39.
    发明授权
    Digitally tuned, integrated baluns with enhanced linearity for multi-band radio applications 有权
    数字调谐,集成巴伦,具有增强的线性度,适用于多频段无线电应用

    公开(公告)号:US07688158B2

    公开(公告)日:2010-03-30

    申请号:US11904865

    申请日:2007-09-28

    IPC分类号: H03H11/32 H01P5/10 H04B1/50

    CPC分类号: H03H11/34 H03H7/46 H03H11/48

    摘要: An integrated balun includes a low pass filter and a high pass filter that are formed on a semiconductor chip using tunable reactive elements. The outputs of the low pass filter and the high pass filter are tied together to form the single ended output of the balun. The inputs of the low pass filter and the high pass filter form the differential inputs of the balun. The low pass filter and the high pass filter each include a number of tunable networks for achieving the tunable reactive elements. Each tunable network includes at least one switching transistor and at least one fixed value reactive elements. In at least one embodiment, dynamic biasing circuitry may be provided to improve the linearity and reduce the insertion loss of the balun.

    摘要翻译: 集成的平衡 - 不平衡变压器包括使用可调谐的无功元件形成在半导体芯片上的低通滤波器和高通滤波器。 低通滤波器和高通滤波器的输出端连接在一起形成平衡 - 不平衡转换器的单端输出。 低通滤波器和高通滤波器的输入形成了平衡 - 不平衡变换器的差分输入。 低通滤波器和高通滤波器各自包括用于实现可调谐无功元件的多个可调谐网络。 每个可调谐网络包括至少一个开关晶体管和至少一个固定值的无功元件。 在至少一个实施例中,可以提供动态偏置电路以改善线性并减小巴伦的插入损耗。