公开(公告)号：US06973297B1

公开(公告)日：2005-12-06

申请号：US10070012

申请日：2000-09-01

申请人： Tajinder Manku ,  Lawrence Wong ,  Yang Ling

发明人： Tajinder Manku ,  Lawrence Wong ,  Yang Ling

IPC分类号： H03D3/00 ,  H03D7/16 ,  H04B1/00 ,  H04B1/04 ,  H04B1/30 ,  H04B1/26

CPC分类号： H04B1/30 ,  H03D3/008 ,  H03D7/163 ,  H03D7/166 ,  H04B1/00 ,  H04B1/0475 ,  H04B2001/0491

摘要： This patent describes a method of removing the LO-leakage and 1/f noise problems associated with direct conversion RF receivers and other demodulators. In order to solve this problem a virtual LO™ signal is generated within the RF signal path which is tuned to the incoming RF signal. The virtual local oscillator (VLO) signal is constructed using signals that do not contain a significant amount of power (or no power at all) at the LO frequency. Any errors in generating the virtual LO signal are minimized using a closed loop correction scheme.

摘要翻译： 该专利描述了一种去除与直接转换RF接收机和其他解调器相关的LO泄漏和1 / f噪声问题的方法。 为了解决这个问题，在被调谐到输入RF信号的RF信号路径内产生虚拟LO（TM）信号。 虚拟本地振荡器（VLO）信号使用在LO频率下不包含大量功率（或完全没有功率）的信号构成。 使用闭环校正方案来最小化产生虚拟LO信号的任何错误。

公开(公告)号：US06590438B1

公开(公告)日：2003-07-08

申请号：US10096118

申请日：2002-03-08

申请人： Tajinder Manku ,  Yang Ling

发明人： Tajinder Manku ,  Yang Ling

IPC分类号： G11B700

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0084

摘要： The invention describes improvements to a balanced active demodulator subsystem implemented in Radio Frequency integrated circuit technology that simplify the configuration and set-up of a balanced demodulator section and reduce the labor and time required during manufacture to adjust the demodulation characteristics for optimum performance. The subsystem allows for the selection of various combinations of components during use, during configuration and set-up, or during both phases, and comprises a mixer, a plurality of parallel RF balanced amplifier input stages operationally connected to the mixer, a first set of switches arranged to permit the independent selection and making operable one of the RF balanced amplifier stages, a number of pairs of current sources arranged to provide bias currents for the RF balanced amplifier input stages to reduce the current required to be passed through the balanced demodulator section; and a second set of switches arranged to permit the independent selection and making operable one of said pairs of current sources. The invention provides a balanced demodulator subsystem suitable for use in products in which cost-effectiveness is a critical factor, such as those used in personal communications.

摘要翻译： 本发明描述了在射频集成电路技术中实现的平衡有源解调器子系统的改进，其简化了平衡解调器部分的配置和设置，并减少了制造期间所需的劳动力和时间，以调整解调特性以获得最佳性能。 子系统允许在使用期间，在配置和建立期间或在两个阶段期间选​​择组件的各种组合，并且包括混合器，可操作地连接到混频器的多个并联RF平衡放大器输入级，第一组 开关，其被布置成允许独立选择并使得可操作的RF平衡放大器级中的一个，布置成为RF平衡放大器输入级提供偏置电流的多对电流源，以减少要通过平衡解调器部分的电流 ; 以及第二组开关，其布置成允许独立选择并使得可操作的所述一对电流源中的一个。 本发明提供了一种适用于成本效益是关键因素的产品中的平衡解调器子系统，例如用于个人通信中的那些。

公开(公告)号：US07046980B1

公开(公告)日：2006-05-16

申请号：US10070280

申请日：2000-09-01

申请人： Tajinder Manku ,  Chris Snyder ,  Gareth Weale ,  Lawrence Wong

发明人： Tajinder Manku ,  Chris Snyder ,  Gareth Weale ,  Lawrence Wong

IPC分类号： H04B1/26

CPC分类号： H04B1/30 ,  H03D3/008 ,  H03D7/163 ,  H03D7/166 ,  H04B1/00 ,  H04B1/0475 ,  H04B2001/0491

摘要： This patent describes a method and system which overcomes the LO-leakage problem of direct conversion and similar RF transmitters and receivers. To solve this problem a virtual LO™ signal is generated which emulates mixing with a local oscillator (LO) signal. However, the virtual local oscillator (VLO) signal is constructed using signals that do not contain a significant amount of power (or no power at all) at the wanted output RF frequency, so there is no LO component to leak to the output. The invention also does not require sophisticated filters or large capacitors as other designs in the art, so it is fully integratable.

摘要翻译： 该专利描述了克服直接转换和类似RF发射器和接收器的LO泄漏问题的方法和系统。 为了解决这个问题，产生模拟与本地振荡器（LO）信号的混合的虚拟LO（TM）信号。 然而，虚拟本地振荡器（VLO）信号使用在所需输出RF频率下不包含大量功率（或根本无功率）的信号来构造，因此没有LO分量泄漏到输出端。 本发明也不需要复杂的滤波器或大电容器作为本领域的其他设计，因此它是完全可整合的。

公开(公告)号：US07164897B2

公开(公告)日：2007-01-16

申请号：US10486830

申请日：2002-08-28

申请人： Tajinder Manku ,  Yang Ling ,  William Kung

发明人： Tajinder Manku ,  Yang Ling ,  William Kung

IPC分类号： H04B1/18

CPC分类号： H04B1/28 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1466 ,  H03D7/1483 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0084 ,  H03D2200/009

摘要： An inexpensive, high-performance, fully-integrable, multi-standard transceiver with a topology including: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aperiodic mixing signals. The use of aperiodic mixing signals allows a fully-integrated transceiver to be built. Embodiments of the active mixer include those having electrically-adjustable performance and allowing multiple RF signal inputs. This allows the topology to be employed in multi-band, multi-frequency applications, while still providing high performance.

摘要翻译： 具有拓扑结构的便宜，高性能，完全可集成的多标准收发器，包括：有源混频器，其次是高通滤波器和无源混频器。 输入信号使用一对互补的非周期性混合信号进行调制或解调。 使用非周期混合信号可以建立一个完全集成的收发器。 有源混频器的实施例包括具有电可调节性能并允许多个RF信号输入的那些。 这允许在多频，多频应用中使用拓扑，同时仍然提供高性能。

公开(公告)号：US07215931B2

公开(公告)日：2007-05-08

申请号：US10363158

申请日：2002-06-19

申请人： Chris Snyder ,  Tajinder Manku ,  Gareth Weale ,  Lawrence Wong

发明人： Chris Snyder ,  Tajinder Manku ,  Gareth Weale ,  Lawrence Wong

IPC分类号： H04B1/40 ,  H04B1/18 ,  H04B1/16 ,  H04B1/38 ,  H04B1/66

CPC分类号： H03D7/163 ,  H04B1/406

摘要： This patent describes a method and system which overcomes the LO-leakage problem during modulation and demodulation, common to direct conversion and similar RF transmitters and receivers. This problem is solved using a virtual local oscillator (VLO™) signal which emulates mixing with a local oscillators (LO) signal. The VLO signal is constructed using complementary mixing signals that suppress mixing power in the bandwidth of the input signal, and within the bandwidth of the output frequency. Specifically, mixing is done in two or more stages, using time-varying mixing signals φ1 and φ2 which satisfy the following criteria: φ1*φ2 having significant power at the frequency of the LO being emulated, one of φ1 and φ2 having minimal power around the frequency of the output signal y(t), and the other of φ1 and φ2 having minimal power around the center frequency, fRF, of the input signal x(t).

摘要翻译： 该专利描述了克服在调制和解调期间的LO泄漏问题的方法和系统，其直接转换和类似的RF发射器和接收器是共同的。 使用模拟与本地振荡器（LO）信号的混合的虚拟本地振荡器（VLO TM）信号来解决该问题。 使用互补混合信号构成VLO信号，其抑制输入信号的带宽中的混合功率，并且在输出频率的带宽内。 具体地说，使用满足以下标准的时变混合信号phi1和2i2的两个或更多个阶段进行混合：phi <1 / 在正在仿真的LO的频率处具有显着功率的功能，具有在频率附近具有最小功率的一个phi <1>和2 的输出信号y（t），并且具有围绕中心频率f RF的最小功率的另一个phi <1> 1＆lt; 2＆lt; 2＆gt; 的输入信号x（t）。

公开(公告)号：US09014625B2

公开(公告)日：2015-04-21

申请号：US13482083

申请日：2012-05-29

申请人： Tajinder Manku

发明人： Tajinder Manku

IPC分类号： H04B5/00

CPC分类号： H04B5/0062 ,  G06K19/0723 ,  H04B5/0075 ,  H04B5/0081

摘要： An inductive coupling apparatus for modifying an incoming radio frequency (RF) signal includes an inductive element. A variable impedance circuit includes an output electrically coupled to the inductive element. A band-pass delta sigma modulator is coupled to the variable impedance circuit and digitally controls the output of the variable impedance circuit. The incoming RF signal is modified as the coupled impedance of the inductive element is adjusted in accordance with the output of the variable impedance circuit.

摘要翻译： 用于修改输入射频（RF）信号的电感耦合装置包括电感元件。 可变阻抗电路包括电耦合到电感元件的输出端。 带通ΔΣ调制器耦合到可变阻抗电路并数字地控制可变阻抗电路的输出。 随着可变阻抗电路的输出调整电感元件的耦合阻抗，输入RF信号被修改。

公开(公告)号：US09014624B2

公开(公告)日：2015-04-21

申请号：US13482008

申请日：2012-05-29

申请人： Tajinder Manku

发明人： Tajinder Manku

IPC分类号： H04B5/00

CPC分类号： H04B5/0062 ,  H04B5/0075 ,  H04B5/0081

摘要： An inductive coupling apparatus for modifying an incoming radio frequency (RF) signal includes an inductive element for modifying the incoming RF signal in accordance with a coupled impedance characteristic of the inductive element. A variable impedance circuit includes an output electrically coupled to the inductive element. A low pass delta sigma modulator is coupled to the variable impedance circuit and digitally controls the output of the variable impedance circuit, the coupled impedance of the inductive element being adjusted based on the output of the variable impedance circuit.

摘要翻译： 用于修改输入射频（RF）信号的电感耦合装置包括用于根据电感元件的耦合阻抗特性修改输入RF信号的电感元件。 可变阻抗电路包括电耦合到电感元件的输出端。 低通量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，基于可变阻抗电路的输出来调整电感元件的耦合阻抗。

公开(公告)号：US08743746B2

公开(公告)日：2014-06-03

申请号：US13557507

申请日：2012-07-25

申请人： Tajinder Manku ,  Zohaib Moti

发明人： Tajinder Manku ,  Zohaib Moti

IPC分类号： H04B7/005

CPC分类号： H04B1/525

摘要： A radio transceiver including a transmitter and a receiver. A filter coupled to an output of the transmitter, the filter has one or more inductors and one or more capacitors, where the filter is tuned by varying one or more capacitance values of the one or more capacitors in the filter to tune the filter. The one or more capacitors are Barium Strontium Titanate (BST) ceramic integrated capacitors that are each tuned by application of a bias voltage thereto. A filter tuner circuit is configured to apply the bias voltage to the one or more capacitors, where the bias voltage is initially established as a stored initial value, and where the bias voltage is refined by a proportional-integral-derivative (PID) controller configured to optimize a power within the transceiver. This abstract is not to be considered limiting since various implementations may incorporate more, fewer or different elements.

公开(公告)号：US20130300619A1

公开(公告)日：2013-11-14

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 ,  H01Q1/50

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：US20120022968A1

公开(公告)日：2012-01-26

申请号：US12902828

申请日：2010-10-12

申请人： Tajinder Manku

发明人： Tajinder Manku

IPC分类号： H04W12/08 ,  G06F17/30

CPC分类号： H04W12/06 ,  G06Q30/0613 ,  H04W48/20

摘要： A wireless communication device is configured to be able to communicate via both a first access point and a second access point for using the first access point to obtain validation credentials in order to permit use of the second access point to access a network. The wireless communication device comprises a processor; and a non-transitory computer readable medium having stored thereon computer executable instructions. The instructions are operable to: initiate communication with the second access point in order to access a network; obtain an access point identifier from the second access point, the access point identifier for identifying the second access point; transmit the access point identifier to a validation server via the first access point; receive validation credentials from the validation server via the first access point; and use the validation credentials to validate the wireless communication device with the second access point to obtain access to the network.

摘要翻译： 无线通信设备被配置为能够经由第一接入点和第二接入点经由第二接入点进行通信，以便使用第一接入点来获得有效凭证，以允许使用第二接入点来接入网络。 无线通信设备包括处理器; 以及其上存储有计算机可执行指令的非暂时性计算机可读介质。 所述指令可操作以：发起与所述第二接入点的通信以便接入网络; 从第二接入点获取接入点标识符，用于识别第二接入点的接入点标识符; 经由第一接入点将接入点标识符发送到验证服务器; 通过第一接入点从验证服务器接收验证凭证; 并使用验证凭证来验证具有第二接入点的无线通信设备以获得对网络的访问。