利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

55 条记录 (耗时 0.029 秒)

    Baseband digital offset correction
    1.
    发明授权
    Baseband digital offset correction 有权
    基带数字偏移校正

    公开(公告)号：US06313769B1

    公开(公告)日：2001-11-06

    申请号：US09563874

    申请日：2000-05-03

    申请人： Mandell J. Mangahas ,  Ramin Khoini-Poorfard

    发明人： Mandell J. Mangahas ,  Ramin Khoini-Poorfard

    IPC分类号： H03M106

    CPC分类号： H03M1/1019 ,  H03M1/66

    摘要： A signal processing system includes a main digital-to-analog converter (DAC) for receiving a digital baseband signal and converting the digital signal into an analog signal. Also included in the system is a connection circuit for receiving the analog signal, and output terminal, and an analog filter coupled between the connection circuit and the output terminal for filtering the analog signal. The system includes a calibration circuit coupled between the connection circuit and the output terminal for setting an offset voltage level. The calibration circuit includes (a) an approximation circuit coupled to the output terminal and operable during a calibration mode to determine the offset voltage level and store the offset voltage level as a digital offset signal and (b) an offset DAC coupled between the connection circuit and the approximation circuit for converting the digital offset signal into the offset voltage level. The connection circuit, which is a node, subtracts the offset voltage level from the analog signal.

    摘要翻译： 信号处理系统包括用于接收数字基带信号并将数字信号转换为模拟信号的主数/模转换器（DAC）。 该系统还包括用于接收模拟信号的连接电路和输出端子，以及耦合在连接电路和输出端子之间的模拟滤波器，用于对模拟信号进行滤波。 该系统包括耦合在连接电路和输出端子之间的校准电路，用于设定偏移电压电平。 校准电路包括（a）耦合到输出端并且可在校准模式期间操作以确定偏移电压电平并将偏移电压电平存储为数字偏移信号的近似电路，以及（b）耦合在连接电路 以及用于将数字偏移信号转换为偏移电压电平的近似电路。 作为节点的连接电路从模拟信号中减去偏移电压电平。

    Shielded differential inductor
    3.
    发明授权
    Shielded differential inductor 有权
    屏蔽差分电感

    公开(公告)号：US08587398B2

    公开(公告)日：2013-11-19

    申请号：US12570462

    申请日：2009-09-30

    申请人： Sherry X. Wu ,  Mustafa H. Koroglu ,  Ramin Khoini-Poorfard ,  Alessandro Piovaccari

    发明人： Sherry X. Wu ,  Mustafa H. Koroglu ,  Ramin Khoini-Poorfard ,  Alessandro Piovaccari

    IPC分类号： H01F27/32

    CPC分类号： H01F17/0006 ,  H01F2017/008 ,  H01L23/5225 ,  H01L23/5227 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/124

    摘要： A shielded differential inductor forms a high quality factor (high-Q) inductor that is configured to attenuate frequency spurs and/or noise from magnetic coupling generated by electrical structures on or off of a substrate as well as interference received by other components from magnetic coupling generated by the inductor. The shielded differential inductor includes a differential inductor and a shield that substantially isolates the electrical field between the inductor and the substrate to reduce substrate current loss. The shield includes sets of finger structures that extend beyond the width of the inductor and a hub and spoke configuration of ground conductors that connect the sets of finger structures to ground.

    摘要翻译： 屏蔽差分电感器形成高质量因子（高Q）电感器，其被配置为衰减由电气结构产生的磁耦合引起的基板的频率杂散和/或噪声以及由其他部件从磁耦合接收的干扰 由电感产生。 屏蔽差分电感器包括差分电感器和屏蔽层，其基本上隔离电感器和衬底之间的电场，以减少衬底电流损耗。 护罩包括延伸超过电感器宽度的指状结构的集合以及将手指结构组连接到地的接地导体的轮毂和轮辐配置。

    Integrated receivers and integrated circuit having integrated inductors
    4.
    发明授权
    Integrated receivers and integrated circuit having integrated inductors 有权
    具有集成电感器的集成接收器和集成电路

    公开(公告)号：US08494470B2

    公开(公告)日：2013-07-23

    申请号：US13160564

    申请日：2011-06-15

    申请人： Ramin Khoini-Poorfard ,  Alessandro Piovaccari ,  Aslamali A. Rafi ,  Mustafa H. Koroglu ,  David S. Trager ,  Abdulkerim L. Coban

    发明人： Ramin Khoini-Poorfard ,  Alessandro Piovaccari ,  Aslamali A. Rafi ,  Mustafa H. Koroglu ,  David S. Trager ,  Abdulkerim L. Coban

    IPC分类号： H04B1/06

    CPC分类号： H04B1/28 ,  H03H11/04 ,  H04B1/30 ,  H04L27/148 ,  H04N5/455 ,  H04N5/50

    摘要： An integrated wideband receiver includes first and second signal processing paths and a controller. The first signal processing path has an input, and an output for providing a first processed signal, and comprises a first tracking bandpass filter having a first integrated inductor. The second signal processing path has an input, and an output for providing a second processed signal, and comprises a second tracking bandpass filter having a second integrated inductor. The controller is for enabling one of the first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal. The controller, the first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip.

    摘要翻译： 集成宽带接收机包括第一和第二信号处理路径和控制器。 第一信号处理路径具有输入和用于提供第一处理信号的输出，并且包括具有第一集成电感器的第一跟踪带通滤波器。 第二信号处理路径具有输入和用于提供第二处理信号的输出，并且包括具有第二集成电感器的第二跟踪带通滤波器。 控制器用于启用与射频（RF）输入信号的选定信道相对应的第一和第二信号处理路径之一以提供输出信号。 控制器，第一集成电感器和所述第二集成电感器形成在单个集成电路芯片上。

    FREQUENCY SYNTHESIZER
    6.
    发明申请
    FREQUENCY SYNTHESIZER 有权
    频率合成器

    公开(公告)号：US20110215848A1

    公开(公告)日：2011-09-08

    申请号：US12715728

    申请日：2010-03-02

    申请人： Mustafa H. Koroglu ,  Sherry X. Wu ,  Ramin Khoini-Poorfard ,  Alessandro Piovaccari

    发明人： Mustafa H. Koroglu ,  Sherry X. Wu ,  Ramin Khoini-Poorfard ,  Alessandro Piovaccari

    IPC分类号： H03L7/06

    CPC分类号： H03L7/06

    摘要： A frequency synthesizer includes a controlled oscillator configured to extend a temperature range and phase noise of the synthesizer without compromising the frequency coverage of the synthesizer. The frequency synthesizer also includes bias generation circuitry that sets a bias current of a charge pump to reduce bandwidth variations of the synthesizer. The frequency synthesizer further includes switching circuitry to dynamically turn a charge pump on and off to reduce effects of current leakage in the charge pump.

    摘要翻译： 频率合成器包括受控振荡器，其被配置为在不损害合成器的频率覆盖的情况下延长合成器的温度范围和相位噪声。 频率合成器还包括偏置产生电路，其设置电荷泵的偏置电流以减少合成器的带宽变化。 频率合成器还包括开关电路，以动态地打开和关闭电荷泵，以减少电荷泵中电流泄漏的影响。

    Controlling gain in a satellite receiver
    8.
    发明申请
    Controlling gain in a satellite receiver 失效
    控制卫星接收机的增益

    公开(公告)号：US20070081615A1

    公开(公告)日：2007-04-12

    申请号：US11247477

    申请日：2005-10-11

    申请人： Ramin Khoini-Poorfard ,  David Trager

    发明人： Ramin Khoini-Poorfard ,  David Trager

    IPC分类号： H04L27/08 ,  H04B1/10

    CPC分类号： H04L27/3809 ,  H03G3/3068 ,  H03M1/185

    摘要： In one embodiment, the present invention includes a method for digitally detecting a first signal strength corresponding to a multi-channel spectrum of an incoming radio frequency (RF) spectrum and digitally detecting a second signal strength corresponding to a selected channel of the incoming RF spectrum. Based on these values, one or more one gain stages of a receiver, such as a satellite television receiver for the incoming RF spectrum, may be controlled. Other embodiments are described and claimed.

    摘要翻译： 在一个实施例中，本发明包括一种用于数字检测对应于输入射频（RF）频谱的多信道频谱的第一信号强度的方法，并且数字地检测对应于输入RF频谱的选定信道的第二信号强度 。 基于这些值，可以控制接收机的一个或多个增益级，例如用于输入RF频谱的卫星电视接收机。 描述和要求保护其他实施例。

    Method for tuning a bandpass analog-to-digital converter and associated architecture
    10.
    发明授权
    Method for tuning a bandpass analog-to-digital converter and associated architecture 有权
    用于调谐带通模数转换器和相关架构的方法

    公开(公告)号：US06819274B2

    公开(公告)日：2004-11-16

    申请号：US10412961

    申请日：2003-04-14

    申请人： Andrew W. Krone ,  Ramin Khoini-Poorfard

    发明人： Andrew W. Krone ,  Ramin Khoini-Poorfard

    IPC分类号： H03M100

    CPC分类号： H03L7/18 ,  H03J3/26

    摘要： Methods and architectures for tuning bandpass analog-to-digital converters (ADCs) are disclosed that can be used, for example, with receiver architectures and associated methods that are also disclosed. The notch of the bandpass ADC can be tuned to the desired channel frequency by adjusting the notch to reduce noise energy in the output signal through a feedback process that adjusts the tuning signal. In addition, a master-slave approach can be implemented to tune a tunable bandpass filter configured as a slave circuit based upon the tuning adjustments made to the master bandpass ADC circuit. In addition, receiver architectures and associated methods are disclosed that utilize coarse analog tune circuitry to provide initial analog coarse tuning of desired channels within a received spectrum signal, such as a set-top box signal spectrum for satellite communications.

    摘要翻译： 公开了用于调谐带通模数转换器（ADC）的方法和架构，其可以用于例如还公开的接收机架构和相关联的方法。 带通ADC的陷波可以通过调整陷波来调节到所需的信道频率，以通过调整调谐信号的反馈过程来减少输出信号中的噪声能量。 此外，可以实现主从方法，以基于对主带通ADC电路的调谐调整来调整配置为从电路的可调谐带通滤波器。 此外，公开了接收机架构和相关方法，其利用粗略的模拟调谐电路来提供接收频谱信号（例如用于卫星通信的机顶盒信号频谱）内的期望信道的初始模拟粗调。