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55 条记录 (耗时 0.027 秒)

    Low noise amplifier and method of input impedance control for terrestrial and cable modes
    21.
    发明授权
    Low noise amplifier and method of input impedance control for terrestrial and cable modes 有权
    低噪声放大器和地面和电缆模式的输入阻抗控制方法

    公开(公告)号：US08611844B2

    公开(公告)日：2013-12-17

    申请号：US13344227

    申请日：2012-01-05

    申请人： Yu Su ,  Mustafa H. Koroglu ,  Abhishek Kammula ,  Ramin Khoini-Poorfard

    发明人： Yu Su ,  Mustafa H. Koroglu ,  Abhishek Kammula ,  Ramin Khoini-Poorfard

    IPC分类号： H04B1/16

    CPC分类号： H04N5/455 ,  H04B1/18 ,  H04H40/27 ,  H04N21/42607 ,  H04N21/6112 ,  H04N21/6118

    摘要： A low noise amplifier (LNA) for use in a receiver circuit includes an adjustable impedance network including an input for receiving a radio frequency signal, a plurality of control inputs, and an output. The LNA further includes a controller coupled to the plurality of control inputs and configured to control an impedance of the adjustable impedance network. The controller controls the adjustable impedance network to provide a relatively low impedance in a terrestrial mode and to provide a relatively high impedance in a cable mode.

    摘要翻译： 用于接收器电路的低噪声放大器（LNA）包括可调阻抗网络，其包括用于接收射频信号的输入，多个控制输入和输出。 LNA还包括耦合到多个控制输入并被配置为控制可调阻抗网络的阻抗的控制器。 控制器控制可调阻抗网络以在地面模式中提供相对较低的阻抗并且在电缆模式中提供相对较高的阻抗。

    Low Noise Amplifier and Method of Input Impedance Control for Terrestrial and Cable Modes
    23.
    发明申请
    Low Noise Amplifier and Method of Input Impedance Control for Terrestrial and Cable Modes 有权
    低噪声放大器和地面和电缆模式输入阻抗控制方法

    公开(公告)号：US20120222082A1

    公开(公告)日：2012-08-30

    申请号：US13344227

    申请日：2012-01-05

    申请人： Yu Su ,  Mustafa H. Koroglu ,  Abhishek Kammula ,  Ramin Khoini-Poorfard

    发明人： Yu Su ,  Mustafa H. Koroglu ,  Abhishek Kammula ,  Ramin Khoini-Poorfard

    IPC分类号： H04N21/40

    CPC分类号： H04N5/455 ,  H04B1/18 ,  H04H40/27 ,  H04N21/42607 ,  H04N21/6112 ,  H04N21/6118

    摘要： A low noise amplifier (LNA) for use in a receiver circuit includes an adjustable impedance network including an input for receiving a radio frequency signal, a plurality of control inputs, and an output. The LNA further includes a controller coupled to the plurality of control inputs and configured to control an impedance of the adjustable impedance network. The controller controls the adjustable impedance network to provide a relatively low impedance in a terrestrial mode and to provide a relatively high impedance in a cable mode.

    摘要翻译： 用于接收器电路的低噪声放大器（LNA）包括可调阻抗网络，其包括用于接收射频信号的输入，多个控制输入和输出。 LNA还包括耦合到多个控制输入并被配置为控制可调阻抗网络的阻抗的控制器。 控制器控制可调阻抗网络以在地面模式中提供相对较低的阻抗并且在电缆模式中提供相对较高的阻抗。

    Controlling gain in a satellite receiver
    26.
    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
    28.
    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。

    Upsampling filter having one-bit multipliers for multiple spread-data streams
    29.
    发明授权
    Upsampling filter having one-bit multipliers for multiple spread-data streams 有权
    具有用于多个扩展数据流的一位乘法器的上采样滤波器

    公开(公告)号：US06603804B1

    公开(公告)日：2003-08-05

    申请号：US09411152

    申请日：1999-10-01

    申请人： Ramin Khoini-Poorfard ,  Lysander B. Lim ,  Malcolm H. Smith

    发明人： Ramin Khoini-Poorfard ,  Lysander B. Lim ,  Malcolm H. Smith

    IPC分类号： H04B169

    CPC分类号： H03H17/0223

    摘要： A transmit portion of a WB-CDMA transceiver generates one or more spread data streams having values represented by a single bit, allowing for filtering of spread and combined data streams with a root raised cosine (RRC) filter employing single-bit multipliers. The RRC filter is a digital filter that i) employs multiplication of two values in which the length of at least one value is one bit; ii) is preferably implemented with muxs or a simple logic operator; and iii) may employ upsampling and modulation encoding of filter coefficients to reduce the coefficient length to, for example, one bit. The RRC filter may be an FIR filter having either one-bit or multi-bit coefficients, and apply RRC filtering to a spread user stream either before or after the spread user streams are combined. For some implementations, RRC filters are employed to filter each spread user stream prior to combining several processed user steams. For other implementations, the multi-bit valued data stream representing the combined user streams is upsampled to form an upsampled data stream of single-bit values, and RRC filtering is then applied to the upsampled data stream. Alternatively, implementations may use upsampled RRC filter coefficients that allow RRC filtering on the combined spread user streams represented as a sequence of multi-bit values.

    摘要翻译： WB-CDMA收发器的发送部分产生具有由单个比特表示的值的一个或多个扩展数据流，允许使用单比特乘法器的根升余弦（RRC）滤波器对扩展和组合数据流进行滤波。 RRC滤波器是数字滤波器，其i）采用其中至少一个值的长度为1比特的两个值的乘法; ii）优选地用多路复用器或简单的逻辑运算符实现; 和iii）可以采用滤波器系数的上采样和调制编码来将系数长度减小到例如一位。 RRC滤波器可以是具有一比特或多比特系数的FIR滤波器，并且在扩展用户流合并之前或之后对扩展用户流应用RRC滤波。 对于一些实现方式，采用RRC滤波器来在组合若干已处理的用户流之前过滤每个扩展用户流。 对于其他实施方式，表示组合用户流的多位值数据流被上采样以形成单位值的上采样数据流，然后将RRC滤波应用于上采样数据流。 或者，实现可以使用上采样的RRC滤波器系数，其允许对表示为多位值序列的组合扩展用户流进行RRC过滤。