公开(公告)号：US20050104665A1

公开(公告)日：2005-05-19

申请号：US10712596

申请日：2003-11-13

申请人： Alyosha Molnar ,  Rahul Magoon ,  Madhukar Reddy ,  Jackie Cheng

发明人： Alyosha Molnar ,  Rahul Magoon ,  Madhukar Reddy ,  Jackie Cheng

IPC分类号： H03L7/099 ,  H03L7/00

CPC分类号： H03L7/099

摘要： Embodiments of the invention provide techniques for calibrating voltage-controlled oscillators (VCOs). Multiple VCOs may be disposed on a chip with the VCOs having different frequency ranges. The VCOs may be selected and tested to determine a desired VCO to use to tune to a selected channel frequency. Each of the VCOs has multiple possible varactor configurations. The varactor configurations of the desired VCO determined to be used to tune to the selected channel frequency can be selected and tested to determine a desired varactor configuration for the desired VCO. The desired VCO with the desired varactor configuration will preferably be able to produce a full range of desired frequencies corresponding to all channel frequencies desired.

摘要翻译： 本发明的实施例提供了用于校准压控振荡器（VCO）的技术。 多个VCO可以设置在具有不同频率范围的VCO的芯片上。 可以选择和测试VCO以确定用于调谐到所选择的信道频率的期望的VCO。 每个VCO具有多个可能的变容二极管配置。 可以选择和测试确定用于调谐到所选频道频率的所需VCO的变容二极管配置，以确定所需VCO的期望变容二极管配置。 具有期望的变容二极管配置的期望的VCO将优选地能够产生对应于期望的所有信道频率的所需频率的全范围。

公开(公告)号：US06933789B2

公开(公告)日：2005-08-23

申请号：US10712596

申请日：2003-11-13

申请人： Alyosha C. Molnar ,  Rahul Magoon ,  Madhukar Reddy ,  Jackie Cheng

发明人： Alyosha C. Molnar ,  Rahul Magoon ,  Madhukar Reddy ,  Jackie Cheng

IPC分类号： H03L7/099 ,  H03L7/00 ,  H03B27/00

CPC分类号： H03L7/099

摘要： Embodiments of the invention provide techniques for calibrating voltage-controlled oscillators (VCOs). Multiple VCOs may be disposed on a chip with the VCOs having different frequency ranges. The VCOs may be selected and tested to determine a desired VCO to use to tune to a selected channel frequency. Each of the VCOs has multiple possible varactor configurations. The varactor configurations of the desired VCO determined to be used to tune to the selected channel frequency can be selected and tested to determine a desired varactor configuration for the desired VCO. The desired VCO with the desired varactor configuration will preferably be able to produce a full range of desired frequencies corresponding to all channel frequencies desired.

公开(公告)号：US09991847B2

公开(公告)日：2018-06-05

申请号：US13336451

申请日：2011-12-23

申请人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

发明人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

IPC分类号： H03D7/16 ,  H04B1/10 ,  H04B15/04

CPC分类号： H03D7/165 ,  H03D2200/005 ,  H04B1/1027 ,  H04B15/04 ,  H04B2215/065 ,  H04B2215/068

摘要： A receiver may receive a signal and process each of a plurality of sub-bands of the received signal via a respective one of a plurality of first-type receive chains. The receiver may utilize a signal output by a first one of the plurality of the first-type receive chains to remove undesired signals from a signal output by a second one of the plurality of the first-type receive chains. The undesired signals may comprise aliases and/or harmonics of one or more signals that fall within a sub-band of the first one of the plurality of the first-type receive chains. The receiver may downconvert, filter, and digitize each of the plurality of sub-bands via a corresponding one of the plurality of the first type receive chains. The received signal may encompass the cable television band, and each of the plurality of sub-bands may comprise a plurality of cable television channels.

公开(公告)号：US08526898B2

公开(公告)日：2013-09-03

申请号：US12762900

申请日：2010-04-19

申请人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

发明人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC分类号： H04B1/16

CPC分类号： H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

摘要： A wideband receiver system is provided to concurrently receive multiple RF channels including a number of desired channels that are located in non-contiguous portions of a radio frequency spectrum and to group the number of desired channels into a contiguous frequency band. The system includes a wideband receiver having a complex mixer for down-shifting the multiple RF channels and transforming them to an in-phase signal and a quadrature signal in the baseband. The system further includes a wideband analog-to-digital converter module that digitizes the in-phase and quadrature signals and a digital frontend module that transforms the digital in-phase and quadrature signals to baseband signals that contains only the number of desired RF channels. that are now located in a contiguous frequency band. An up-converter module up-shifts the baseband signals to a contiguous band in an IF spectrum so that the system can directly interface with commercially available demodulators.

摘要翻译： 提供宽带接收机系统以同时接收多个RF信道，包括位于无线电频谱的非连续部分中的多个期望信道，并将期望信道的数目分组成连续的频带。 该系统包括具有复合混频器的宽带接收机，用于对多个RF信道进行下变频并将其变换成基带中的同相信号和正交信号。 该系统还包括将同相和正交信号数字化的宽带模数转换器模块和将数字同相和正交信号转换成仅包含所需RF信道数的基带信号的数字前端模块。 它们现在位于连续的频带中。 上变频器模块将基带信号升级到IF频谱中的连续频带，使系统可以直接与市售解调器接口。

公开(公告)号：US06542029B1

公开(公告)日：2003-04-01

申请号：US09686669

申请日：2000-10-11

申请人： Sabah Khesbak ,  Madhukar Reddy

发明人： Sabah Khesbak ,  Madhukar Reddy

IPC分类号： H03G320

CPC分类号： H03G3/3036

摘要： A system for varying output power of variable-gain amplifiers (VGA) allows for varying the output power transfer function, thus varying the gain, and, hence, the resolution of the output power of the VGA. The preferred embodiment comprises a variable-slope VGA (VSVGA) circuit configured to operate within a closed-loop power-controlled CDMA handset. The VSVGA circuit manipulates the input control voltage of the VGA, thereby, adjusting the gain of the amplifier by varying the slope of a line which models the amplifier output transfer function. Varying gain of the VGA provides for a varying resolution in the VGA amplifier output transfer function. This variation allows for compatibility of a single CDMA handset with different industry standards.

摘要翻译： 用于改变可变增益放大器（VGA）的输出功率的系统允许改变输出功率传递函数，从而改变增益，并因此改变VGA的输出功率的分辨率。 优选实施例包括可变斜率VGA（VSVGA）电路，其被配置为在闭环功率控制的CDMA手持机内操作。 VSVGA电路操纵VGA的输入控制电压，从而通过改变对放大器输出传递函数建模的线的斜率来调节放大器的增益。 VGA的不同增益提供了VGA放大器输出传递功能的不同分辨率。 这种变化允许单个CDMA手机与不同行业标准的兼容性。

公开(公告)号：US20130135983A1

公开(公告)日：2013-05-30

申请号：US13305918

申请日：2011-11-29

申请人： Timothy Gallagher ,  Madhukar Reddy

发明人： Timothy Gallagher ,  Madhukar Reddy

IPC分类号： H04J1/12

CPC分类号： H04J1/12 ,  H04B3/32 ,  H04L5/0005 ,  H04L5/0046 ,  H04L5/0062 ,  H04N7/106 ,  H04N21/6118 ,  H04N21/6168

摘要： Methods and systems for interference avoidance in a multi-protocol communication system may comprise receiving signals in a first communications protocol (FCP) in a first frequency range (FFR), configuring channel usage in a second communications protocol (SCP) in a second frequency range (SFR) based on the received signals to control interference from the SFR to the FFR. Signals may be communicated over coaxial cables based on the configuration of channel usage in the SCP in the SFR based on the received signals, such that aliased signals do not excessively degrade performance of the FCP. The FFR may comprise a cable or satellite television frequency range. The FCP may comprise data over cable service interface standard (DOCSIS). The SCP may comprise multimedia over coaxial alliance (MoCA) standard. The configuring channel usage in the SCP may comprise varying bit loading, power levels, or degree of modulation of signals transmitted over the SCP.

摘要翻译： 在多协议通信系统中用于避免干扰的方法和系统可包括以第一频率范围（FFR）中的第一通信协议（FCP）接收信号，在第二频率范围内的第二通信协议（SCP）中配置信道使用 （SFR），以控制从SFR到FFR的干扰。 信号可以基于接收信号基于SFR中的SCP中的信道使用的配置，通过同轴电缆进行传送，使得混叠信号不会过度降低FCP的性能。 FFR可以包括有线或卫星电视频率范围。 FCP可以包括通过电缆服务接口标准（DOCSIS）的数据。 SCP可以包括多媒体超同轴联盟（MoCA）标准。 SCP中的配置信道使用可以包括通过SCP发送的信号的变化的位加载，功率电平或调制程度。

公开(公告)号：US20130128716A1

公开(公告)日：2013-05-23

申请号：US13301102

申请日：2011-11-21

申请人： Madhukar Reddy ,  Timothy Gallagher

发明人： Madhukar Reddy ,  Timothy Gallagher

IPC分类号： H04J1/12

CPC分类号： H04N21/6118 ,  H04L12/2801 ,  H04N21/4385 ,  H04N21/6168

摘要： Aspects of a method and apparatus for band separation for multiband communication systems are provided. One or more circuits for use in a transceiver may comprise a triplexer and a leakage processing module. The triplexer may comprise a multiband port, a Multimedia Over Coaxial Alliance (MoCA) port, a television upstream port, and a television downstream port. The leakage processing module may comprise a television downstream input port, a cable television downstream output port, a MoCA port, and a cable television upstream port. The leakage processing module may be operable to (1) process a MoCA signal to generate a first compensation signal; (2) process a cable upstream signal to generate a second compensation signal; (3) process a filtered signal based at least in part on the first and second compensation signals; and (4) output the processed filtered signal via the cable television downstream output port of said leakage processing module.

摘要翻译： 提供了用于多频带通信系统的频带分离的方法和装置的方面。 在收发器中使用的一个或多个电路可以包括三工器和泄漏处理模块。 三工器可以包括多频带端口，多媒体同轴联盟（MoCA）端口，电视上行端口和电视下行端口。 泄漏处理模块可以包括电视下游输入端口，有线电视下游输出端口，MoCA端口和有线电视上行端口。 泄漏处理模块可操作为（1）处理MoCA信号以产生第一补偿信号; （2）处理电缆上行信号以产生第二补偿信号; （3）至少部分地基于第一和第二补偿信号来处理滤波信号; 和（4）经由所述泄漏处理模块的有线电视下游输出端口输出经处理的滤波信号。

公开(公告)号：US20110096874A1

公开(公告)日：2011-04-28

申请号：US12762950

申请日：2010-04-19

申请人： Brendan Walsh ,  Stefan Szasz ,  Madhukar Reddy

发明人： Brendan Walsh ,  Stefan Szasz ,  Madhukar Reddy

IPC分类号： H04L27/06

CPC分类号： H03D7/165 ,  G11B27/28 ,  H04B1/0007 ,  H04H40/18 ,  H04H60/13 ,  H04H60/27 ,  H04H60/37 ,  H04H2201/60 ,  H04L27/3818 ,  H04N21/458

摘要： Methods and apparatuses for concurrently recording multiple radio channels. A recorder includes a wideband tuner having a complex mixer for converting a received wideband RF signal to a complex signal that is then digitized. A digital front end module applies a number of complex down-mixers to the digital complex signal to generate the multiple radio channels in the baseband. Each one of the multiple radio channels in the baseband is further filtered, decimated and demodulated. A digital signal processing unit encodes each demodulated channel according to an audio compression format and stores the then encoded audio content to a storage unit. An RBDS decoder parses radio data service information associated with the stored audio content. The radio data service information is stored in a first section of the storage unit while the encoded audio content is stored in a second section of the storage unit.

摘要翻译： 同时记录多个无线电频道的方法和装置。 记录器包括具有用于将接收到的宽带RF信号转换成然后被数字化的复信号的复合混频器的宽带调谐器。 数字前端模块将数个复数下混频器应用于数字复合信号，以在基带中生成多个无线电信道。 基带中的多个无线电信道中的每一个被进一步滤波，抽取和解调。 数字信号处理单元根据音频压缩格式对每个解调的信道进行编码，并将所编码的音频内容存储到存储单元。 RBDS解码器解析与所存储的音频内容相关联的无线电数据服务信息。 无线电数据服务信息被存储在存储单元的第一部分中，而编码的音频内容被存储在存储单元的第二部分中。

公开(公告)号：US20070168767A1

公开(公告)日：2007-07-19

申请号：US11520203

申请日：2006-09-12

申请人： Talal Jaber ,  Srinivas Patil ,  Larry Thatcher ,  Chih-Jen Lin ,  Anil Sabbavarapu ,  David Wu ,  Madhukar Reddy

发明人： Talal Jaber ,  Srinivas Patil ,  Larry Thatcher ,  Chih-Jen Lin ,  Anil Sabbavarapu ,  David Wu ,  Madhukar Reddy

IPC分类号： G11B20/20 ,  G06K5/04 ,  G11B5/00

CPC分类号： G01R31/318552 ,  G01R31/318594 ,  G06F11/2236

摘要： A testing architecture for testing a complex integrated circuit in which each functional unit may be tested independently of the others. Embodiments of the invention allow testing of functional units to take place at slower or faster clock speeds than other portions of the processor without incurring delay or other adverse timing effects.

公开(公告)号：US06339361B1

公开(公告)日：2002-01-15

申请号：US09328927

申请日：1999-06-09

申请人： Sabah Khesbak ,  Madhukar Reddy ,  Pramote Piriyapoksombut ,  Trevor Robinson

发明人： Sabah Khesbak ,  Madhukar Reddy ,  Pramote Piriyapoksombut ,  Trevor Robinson

IPC分类号： H03G310

CPC分类号： H03G3/3042 ,  H03F1/0261 ,  H03F1/302

摘要： A driver system for a power amplifier in a wireless communication handset. The driver system includes a driver and a current source. The driver drives the power amplifier at a level of linearity determined responsive to a variable input bias current provided by the current source. The current source varies the bias current, and thus the degree of linearity provided, responsive to the desired output power of the handset.

摘要翻译： 一种用于无线通信手机中的功率放大器的驱动器系统。 驱动器系统包括驱动器和电流源。 驱动器以响应于由电流源提供的可变输入偏置电流确定的线性度驱动功率放大器。 电流源根据手机所需的输出功率改变偏置电流，从而提供线性度。