公开(公告)号：US07715814B2

公开(公告)日：2010-05-11

申请号：US11569031

申请日：2005-05-13

申请人： Tajinder Manku ,  Masoud Kahrizi

发明人： Tajinder Manku ,  Masoud Kahrizi

IPC分类号： H04B1/10 ,  H04B1/26

CPC分类号： H04B1/30 ,  H03D7/00 ,  H04B15/06 ,  H04B2215/065

摘要： A method and system for dynamically shifting spurious tones away from the desired frequency in a virtual local oscillator receiver, such that any undesired signal residing at such spurious tones are effectively delineated from the desired signal and removed from the RF input signal. The system detects the presence of potential undesired blocker signals in the RF input signal, and initiates an iterative power comparison and mixer signal adjustment loop. As the virtual local oscillator uses two mixer signals, the frequency of one of the mixer signals is adjusted during the loop until the power of the down-converted signal is minimized to a predetermined level. Minimized power in the down-converted signal is indicative of the absence of the blocker signal, since the presence of a relatively high power signal is indicative of a blocker signal overlapping with a desired signal.

摘要翻译： 一种用于在虚拟本地振荡器接收机中动态地将杂散音调从期望频率移位的方法和系统，使得驻留在这种寄生音调处的任何不需要的信号被有效地从期望的信号中描绘出并从RF输入信号中去除。 该系统检测RF输入信号中存在潜在的不希望的阻塞信号，并启动迭代功率比较和混频信号调节环路。 由于虚拟本地振荡器使用两个混频器信号，所以在环路中调整混频信号之一的频率，直到下变频信号的功率被最小化到预定的电平。 下变频信号中的最小化功率表示不存在阻塞信号，因为相对高功率信号的存在表示阻塞信号与期望信号重叠。

公开(公告)号：US20100060333A1

公开(公告)日：2010-03-11

申请号：US12515562

申请日：2007-12-13

申请人： Tajinder Manku ,  Christopher Snyder

发明人： Tajinder Manku ,  Christopher Snyder

IPC分类号： H03L7/06

CPC分类号： H03K5/135 ,  H03L7/091 ,  H03L7/093 ,  H03L7/099 ,  H03L7/10

摘要： A digital phase lock loop (PLL) circuit having a digital charge pump circuit for providing digital signals corresponding to a difference in phase between an internal clock corresponding to a voltage controlled oscillator, and a reference clock. These digital signals are processed by a digital processing circuit for providing digital control signals. Some of the digital control signals are converted into an analog control signal to provide fine control of the voltage controlled oscillator, while the remaining digital control signals provide coarse control of the voltage controlled oscillator.

摘要翻译： 一种具有数字电荷泵电路的数字锁相环（PLL）电路，用于提供对应于与压控振荡器相对应的内部时钟之间的相位差的数字信号和参考时钟。 这些数字信号由用于提供数字控制信号的数字处理电路处理。 一些数字控制信号被转换成模拟控制信号以提供压控振荡器的精细控制，而剩余的数字控制信号提供压控振荡器的粗略控制。

公开(公告)号：US20080182537A1

公开(公告)日：2008-07-31

申请号：US11626964

申请日：2007-01-25

申请人： Tajinder Manku ,  Abdellatif Bellaouar ,  Alan Holden ,  Hamid R. Safari

发明人： Tajinder Manku ,  Abdellatif Bellaouar ,  Alan Holden ,  Hamid R. Safari

IPC分类号： H04B17/00

CPC分类号： H04B1/12 ,  H03D2200/0045 ,  H04B17/21

摘要： An integrated automatic IIP2 calibration architecture for wireless transceivers is disclosed. The architecture enables a wireless transceiver to generate a test radio frequency (RF) signal having a second order tone with minimal additional circuitry. In particular, the test RF signal is generated using a combination of native transceiver circuits and test adaptor circuits. Native transceiver circuits are those circuits implemented on the transceiver chip for executing native transceiver functions during normal operation, which can be used for generating the test (RF) signal. Test adaptor circuits are added to the transceiver chip, more specifically to the native circuits, for enabling the native circuits to generate the test RF signal in a self-test mode of operation. Circuits for implementing a particular IIP2 minimizing scheme can be included on the transceiver chip for automatic IIP2 calibration during the self-test mode of operation.

摘要翻译： 公开了一种用于无线收发器的综合自动IIP2校准架构。 该架构使得无线收发器能够生成具有最小附加电路的具有二阶音调的测试射频（RF）信号。 特别地，使用本机收发器电路和测试适配器电路的组合产生测试RF信号。 本地收发器电路是在收发器芯片上实现的用于在正常操作期间执行本机收发器功能的那些电路，其可用于产生测试（RF）信号。 测试适配器电路被添加到收发器芯片中，更具体地被添加到本地电路，用于使得本机电路能够以自测试操作模式生成测试RF信号。 用于实现特定的IIP2最小化方案的电路可以在自检操作模式下在收发器芯片中包括在自动IIP2校准中。

公开(公告)号：US07263344B2

公开(公告)日：2007-08-28

申请号：US10531231

申请日：2003-10-15

申请人： Tajinder Manku

发明人： Tajinder Manku

IPC分类号： H04B1/26

CPC分类号： H04L25/061 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/161 ,  H03D2200/0043 ,  H03D2200/0047 ,  H03D2200/0084 ,  H03D2200/009 ,  H04B1/26 ,  H04L25/085

摘要： The present invention relates generally to communications, and more specifically to a method and apparatus for minimizing DC offset and second-order modulation products (IM2 noise) while demodulating RF signals. The principle of the invention can be applied to differential, down-conversion circuits (50) consisting of two differential mixers (54, 56) in series, a follows: a pair of current sources Ia and Ib are used to provide current to positive and negative channels of the first differential mixer (54). Providing current to the amplifying transistors of the first mixer (54) reduces the current drawn through the active mixer switches, reducing the noise generated. The current sources 1a and 1b are trimmed in a complementary manner where 1a=I+Delta1, and 1b=Delta1. The value of Δ1 can be determined in a number of manners; for example, it could be established by testing after the circuit has been fabricated, and the value stored on-chip, for future use.

摘要翻译： 本发明一般涉及通信，更具体地涉及一种在解调RF信号的同时最小化DC偏移和二阶调制产物（IM2噪声）的方法和装置。 本发明的原理可以应用于由串联的两个差分混频器（54,56）组成的差分下变频电路（50），如下：一对电流源Ia和Ib用于向正和负电流提供电流， 第一差分混合器（54）的负通道。 向第一混频器（54）的放大晶体管提供电流减少了通过有源混频器开关引起的电流，从而减少了产生的噪声。 电流源1a和1b以互补方式修剪，其中1 a = I + Delta 1，1b = Delta 1。 Delta 1的值可以通过多种方式确定; 例如，可以通过在电路制造之后进行测试，并将该值存储在芯片上，以备将来使用。

公开(公告)号：US6094084A

公开(公告)日：2000-07-25

申请号：US148135

申请日：1998-09-04

申请人： Eyad Abou-Allam ,  Tajinder Manku ,  Michael Maliepaard

发明人： Eyad Abou-Allam ,  Tajinder Manku ,  Michael Maliepaard

IPC分类号： H03D7/14 ,  G06F7/44

CPC分类号： H03F1/223 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03F3/45192 ,  H03D2200/0043 ,  H03D2200/0084 ,  H03F2203/45296 ,  H03F2203/45316 ,  H03F2203/45386 ,  H03F2203/45501 ,  H03F2203/45554

摘要： A low voltage cascode frequency conversion mixer circuit is provided. In place of a conventional current source, an LC tank circuit is used. This makes the circuit function as a mixer only over a narrow band of frequencies centred at the resonance frequency of the LC tank circuit. The circuit mixes an input signal with a local oscillator signal. Advantageously, a lower supply voltage may be used because a smaller DC drop exists across the tank circuit than does across conventional current sources. The circuit may also be used as an amplifier by connecting a DC bias voltage in place of the local oscillator.

摘要翻译： 提供了一种低压共源共栅变频混频电路。 代替常规电流源，使用LC电路。 这使得电路仅在以LC谐振电路的谐振频率为中心的窄频带上作为混频器。 该电路将输入信号与本地振荡器信号混合。 有利的是，可以使用较低的电源电压，因为在整个电路上存在比常规电流源更小的直流电压降。 该电路也可以通过连接DC偏置电压代替本地振荡器而用作放大器。

公开(公告)号：US08847834B2

公开(公告)日：2014-09-30

申请号：US13470472

申请日：2012-05-14

申请人： Tajinder Manku

发明人： Tajinder Manku

IPC分类号： H01Q9/00

CPC分类号： G01S13/756 ,  G06K19/0723 ,  G06K19/0726 ,  G06K19/07786

摘要： An antenna apparatus for backscattering an incoming radio frequency (RF) signal includes an antenna for backscattering the incoming RF signal in accordance with a reflection coefficient characteristic of the antenna. A variable impedance circuit includes an output electrically connected to the antenna. A band-pass delta sigma modulator is coupled to the variable impedance circuit and digitally controls the output of the variable impedance circuit, such that the reflection coefficient of the antenna is adjusted based on the digitally controlled output of the variable impedance circuit. In an RFID network, the apparatus and method reduces the effect of DC offset in the reader device and the effects of the reader device's phase noise, while allowing for complex modulations.

摘要翻译： 用于向后向散射输入射频（RF）信号的天线装置包括用于根据天线的反射系数特性来反向散射输入RF信号的天线。 可变阻抗电路包括电连接到天线的输出。 带通ΔΣ调制器耦合到可变阻抗电路，并且数字地控制可变阻抗电路的输出，使得基于可变阻抗电路的数字控制输出来调整天线的反射系数。 在RFID网络中，该装置和方法减少了读取器装置中DC偏移的影响以及读取器装置的相位噪声的影响，同时允许复杂的调制。

公开(公告)号：US20120120962A1

公开(公告)日：2012-05-17

申请号：US13004652

申请日：2011-01-11

申请人： Lily Ll ,  Nicholas Armstrong ,  Robert Robinson ,  Jakub Schmidtke ,  Tajinder Manku ,  Paul Ward

发明人： Lily Ll ,  Nicholas Armstrong ,  Robert Robinson ,  Jakub Schmidtke ,  Tajinder Manku ,  Paul Ward

IPC分类号： H04L12/56

CPC分类号： H04W12/06 ,  H04L63/18

摘要： A system is provided to facilitate communication with a client via both a first network and a second network. The system comprises a plurality of bandwidth aggregation servers, each bandwidth aggregation server configured to aggregate data packets received from the client via both the first and second networks for transmission to a destination server; and transmit data packets to the client via both the first and second networks in accordance with a scheduling algorithm, the data packets being received from a source server.

摘要翻译： 提供一种系统以便于经由第一网络和第二网络与客户端进行通信。 该系统包括多个带宽聚合服务器，每个带宽聚合服务器被配置为经由第一和第二网络聚合从客户端接收的数据分组，用于传输到目的地服务器; 并且根据调度算法，通过第一和第二网络将数据分组发送到客户端，数据分组从源服务器接收。

公开(公告)号：US07623000B2

公开(公告)日：2009-11-24

申请号：US11778849

申请日：2007-07-17

申请人： Tajinder Manku ,  Abdellatif Bellaouar

发明人： Tajinder Manku ,  Abdellatif Bellaouar

IPC分类号： H04L27/20 ,  H04L27/36

CPC分类号： H03C5/00

摘要： The invention is directed at a hybrid modulation apparatus which combines a polar modulation circuit and a linear modulation circuit. The hybrid apparatus allows a communications device to function as a polar or a linear modulation circuit with less components as the output of the linear modulation circuit is an input of the polar modulation circuit.

摘要翻译： 本发明涉及组合极性调制电路和线性调制电路的混合调制装置。 混合设备允许通信设备用作具有较少组件的极性或线性调制电路，因为线性调制电路的输出是极坐标调制电路的输入。

公开(公告)号：US20080014894A1

公开(公告)日：2008-01-17

申请号：US11569031

申请日：2005-05-13

申请人： Tajinder Manku ,  Masoud Kahrizi

发明人： Tajinder Manku ,  Masoud Kahrizi

IPC分类号： H04B1/26

CPC分类号： H04B1/30 ,  H03D7/00 ,  H04B15/06 ,  H04B2215/065

摘要： A method and system for dynamically shifting spurious tones away from the desired frequency in a virtual local oscillator receiver, such that any undesired signal residing at such spurious tones are effectively delineated from the desired signal and removed from the RF input signal. The system detects the presence of potential undesired blocker signals in the RF input signal, and initiates an iterative power comparison and mixer signal adjustment loop. As the virtual local oscillator uses two mixer signals, the frequency of one of the mixer signals is adjusted during the loop until the power of the down-converted signal is minimized to a predetermined level. Minimized power in the down-converted signal is indicative of the absence of the blocker signal, since the presence of a relatively high power signal is indicative of a blocker signal overlapping with a desired signal.

摘要翻译： 一种用于在虚拟本地振荡器接收机中动态地将杂散音调从期望频率移位的方法和系统，使得驻留在这种寄生音调处的任何不需要的信号被有效地从期望的信号中描绘出并从RF输入信号中去除。 该系统检测RF输入信号中存在潜在的不希望的阻塞信号，并启动迭代功率比较和混频信号调节环路。 由于虚拟本地振荡器使用两个混频器信号，所以在环路中调整混频信号之一的频率，直到下变频信号的功率被最小化到预定电平。 下变频信号中的最小化功率表示不存在阻塞信号，因为相对高功率信号的存在表示阻塞信号与期望信号重叠。

公开(公告)号：US07277683B2

公开(公告)日：2007-10-02

申请号：US10541120

申请日：2004-01-08

申请人： Sathwant Dosanjh ,  William Kung ,  Tajinder Manku

发明人： Sathwant Dosanjh ,  William Kung ,  Tajinder Manku

IPC分类号： H04B1/16

CPC分类号： H03B21/00 ,  H03B21/01 ,  H03B27/00 ,  H03D3/007 ,  H03H7/21 ,  H03H2007/0192 ,  H03J2200/17 ,  H03J2200/40 ,  H04B1/30

摘要： The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demodulators, if the leakage of local oscillator (LO) signals into the received signal path. The invention presents a number of highly integratable circuits which resolve the LO leakage problem, using regenerative divider circuits acting on oscillator signals which are running at a multiple or fraction of the frequency of the desired LO signal, to generate in-phase (I) and quadrature (Q) mixing signals. Embodiments of these circuits also use harmonic subtraction and polyphase mixers, as well as virtual local oscillator TM (VLO) mixing signals. VLO mixing signals are signal pairs which emulate local oscillator signals by means of complementary mono-tonal and multi-tonal mixing signals.

摘要翻译： 本发明一般涉及通信，更具体地涉及用于产生用于RF（射频）信号的上变频和下变频的本地振荡器信号的方法和装置。 如果本地振荡器（LO）信号泄漏到接收信号路径中，调制器和解调器的设计中的主要问题。 本发明提出了许多高度可积分的电路，其解决了LO泄漏问题，使用作用于振荡器信号的再生分压器电路，该振荡器信号以期望LO信号的频率的多个或几分之一运行，以产生同相（I）和 正交（Q）混频信号。 这些电路的实施例也使用谐波减法和多相混频器，以及虚拟本地振荡器TM（VLO）混频信号。 VLO混合信号是通过互补单声道和多音调混合信号模拟本地振荡器信号的信号对。