公开(公告)号：US20160322996A1

公开(公告)日：2016-11-03

申请号：US14931687

申请日：2015-11-03

申请人： Nokia Technologies Oy

发明人： Chadi Jabbour ,  Sudhir Aggarwal ,  Vason P. Srini

IPC分类号： H04B1/10

CPC分类号： H04B1/1036 ,  H03H19/002 ,  H03H19/008 ,  H03H2240/00 ,  H03H2250/00 ,  H04B1/1081

摘要： Methods and apparatus, including computer program products, are provided for receivers. In one aspect there is provided an apparatus. In some example embodiments, there is provided an apparatus. The apparatus may include a first N-path filter configured with at least a first passband, wherein the first N-path filter is coupled to a radio frequency input port providing at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal; a second N-path filter configured with at least a second passband, wherein the second N-path filter is coupled to the radio frequency input port providing at least the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal; and a combiner configured to subtract a first output of the first N-path filter from a second output of the second N-path filter. Related apparatus, systems, methods, and articles are also described.

摘要翻译： 为接收机提供包括计算机程序产品在内的方法和设备。 在一个方面，提供了一种装置。 在一些示例性实施例中，提供了一种装置。 该装置可以包括配置有至少第一通带的第一N路径滤波器，其中第一N路径滤波器耦合到提供至少第一载波聚合信号的射频输入端口，第二载波聚合信号和 干扰信号; 配置有至少第二通带的第二N路径滤波器，其中所述第二N路径滤波器耦合到提供至少所述第一载波聚合信号，所述第二载波聚合信号和所述干扰信号的所述射频输入端口; 以及组合器，被配置为从所述第二N路径滤波器的第二输出中减去所述第一N路径滤波器的第一输出。 还描述了相关装置，系统，方法和制品。

公开(公告)号：US20150288392A1

公开(公告)日：2015-10-08

申请号：US14677938

申请日：2015-04-02

申请人： North Carolina State University

发明人： Brian A. Floyd ,  Charley Theodore Wilson, III

IPC分类号： H04B1/04 ,  H04B1/69 ,  H04W16/14

CPC分类号： H04W16/14 ,  H03H7/48 ,  H03H19/002 ,  H03H19/008 ,  H03H2007/013 ,  H03H2011/0488 ,  H03H2240/00

摘要： Methods, systems, and computer readable media for a tunable filter employing feedforward cancellation are disclosed. According to one aspect, the subject matter described herein includes a tunable transmissive filter that includes a splitter for splitting an input signal into a first signal and a second signal, a first modifier circuit for modifying a characteristic of the first signal to produce a modified first signal, a second modifier circuit for using feedforward cancellation to modify a characteristic of the second signal to produce a modified second signal, the second modifier circuit including an N-path filter, N being an integer greater than 0; and a combiner for combining the modified first signal and the modified second signal to produce a filtered output signal having a bandpass response.

摘要翻译： 公开了使用前馈抵消的可调谐滤波器的方法，系统和计算机可读介质。 根据一个方面，本文所述的主题包括可调透射滤波器，其包括用于将输入信号分成第一信号和第二信号的分路器，第一修改器电路，用于修改第一信号的特性以产生经修改的第一信号 信号，第二修正器电路，用于使用前馈消除来修改第二信号的特性以产生修改的第二信号，第二修改电路包括N路径滤波器，N是大于0的整数; 以及组合器，用于组合经修改的第一信号和修改的第二信号以产生具有带通响应的滤波输出信号。

公开(公告)号：US20150016492A1

公开(公告)日：2015-01-15

申请号：US14363954

申请日：2012-12-20

申请人： ST-Ericsson SA

发明人： Kimmo Koli

IPC分类号： H04B15/00 ,  H04W84/12 ,  H04B1/40

CPC分类号： H04B15/00 ,  H03H19/008 ,  H04B1/40 ,  H04W84/12

摘要： A signal filter (100) comprises a first transferred impedance filter, TIF, (TIFA) having four differential signal paths (PA,1, PA,2, PA,3, PA,4) and a second TIF (TIFB) having four differential signal paths (PB,1, PB,2, PB,3, PB,4)−. A first differential signal port of the first TIF (32A) is coupled to a first differential signal port of the second TIF (32B). A first clock generator (12A) is arranged to provide first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) having four non-overlapping phases for selecting the respective first-TIF differential signal paths (PA,1, PA,2, PA,3, PA,4), and a second clock generator (12B) is arranged to provide second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,J−, CLKB,Q−) having four non-overlapping phases for selecting the respective second-TIF differential signal paths (PB,1, PB,2, PB,3, PB,4). The phases of the second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,Q−) are equal to the phases of the first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) delayed by 45 degrees. The first-TIF first, second, third and fourth clock signals (CLKA,I+, CLKA,Q+, CLKA,I−L, CLKAQ−) and the second-TIF first, second, third and fourth clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) have a duty cycle in the range 16.75% to 25%.

摘要翻译： 信号滤波器（100）包括具有四个差分信号路径（PA，1，PA，2，PA，3，PA，4）和具有四个差分信号的第二TIF（TIFB）的第一传输阻抗滤波器TIF（TIFA） 信号路径（PB，1，PB，2，PB，3，PB，4） - 。 第一TIF（32A）的第一差分信号端口耦合到第二TIF（32B）的第一差分信号端口。 第一时钟发生器（12A）被布置成提供具有四个非重叠相位的第一TIF时钟信号（CLKA，I +，CLKA，Q +，CLKA，I，CLKA，Q-），用于选择相应的第一TIF差分信号 路径（PA，1，PA，2，PA，3，PA，4）和第二时钟发生器（12B）被布置成提供第二TIF时钟信号（CLKB，I +，CLKB，Q +，CLKB，J-， CLKB，Q-）具有用于选择相应的第二TIF差分信号路径（PB，1，PB，2，PB，3，PB，4）的四个非重叠相位。 第二TIF时钟信号（CLKB，I +，CLKB，Q +，CLKB，Q-）的相位等于第一TIF时钟信号（CLKA，I +，CLKA，Q +，CLKA，I，CLKA）的相位 ，Q-）延迟45度。 第一TIF第一，第二，第三和第四时钟信号（CLKA，I +，CLKA，Q +，CLKA，I-L，CLKAQ-）和第二TIF第一，第二，第三和第四时钟信号（CLKB，I + CLKB，Q +，CLKB，I，CLKB，Q-）的占空比在16.75％至25％的范围内。

公开(公告)号：US20120171980A1

公开(公告)日：2012-07-05

申请号：US13173973

申请日：2011-06-30

申请人： Pete Sivonen ,  Jonne Riekki ,  Jouni Kaukovuori ,  Sami Vilhonen ,  Jarkko Jussila

发明人： Pete Sivonen ,  Jonne Riekki ,  Jouni Kaukovuori ,  Sami Vilhonen ,  Jarkko Jussila

IPC分类号： H04B1/18

CPC分类号： H03H19/008

摘要： An integrated circuit for a radio receiver comprising a radio-frequency amplifier and a radio-frequency filter is described. The amplifier receives radio-frequency signals from an antenna, the filter is connected to the amplifier output, and the output of the filter is provided to a processing stage of the receiver. The amplifier comprises an amplifying stage controlled by a radio-frequency input signal and a signal fed back from the filter. The amplifier input impedance is substantially matched to the antenna impedance at a frequency band of interest. The signal fed back from the filter providing attenuation of signals outside the frequency band of interest at the amplifier input. The filter comprises one or more filter components. A filter component comprises a first input and a second input for receiving the amplifier output, a first switch arranged to selectively connect the first input to a first impedance, a second switch arranged to selectively connect the first input to a second impedance, a third switch arranged to selectively connect the second input to the first impedance, and a fourth switch arranged to selectively connect the second input to the second impedance. The first and fourth switches are controlled by a first oscillator signal and the second and third switches are controlled by a second oscillator signal that is 180° out of phase with the first oscillator signal.

摘要翻译： 描述了一种用于包括射频放大器和射频滤波器的无线电接收机的集成电路。 放大器从天线接收射频信号，滤波器连接到放大器输出，滤波器的输出提供给接收器的处理级。 放大器包括由射频输入信号控制的放大级和从滤波器反馈的信号。 放大器输入阻抗基本上与感兴趣的频带处的天线阻抗匹配。 从滤波器反馈的信号在放大器输入端提供感兴趣频带之外的信号衰减。 过滤器包括一个或多个过滤器部件。 滤波器部件包括用于接收放大器输出的第一输入端和第二输入端，布置成选择性地将第一输入端连接到第一阻抗的第一开关，布置成有选择地将第一输入端连接到第二阻抗的第二开关，第三开关 布置成选择性地将第二输入端连接到第一阻抗，以及第四开关，被布置为选择性地将第二输入端连接到第二阻抗。 第一和第四开关由第一振荡器信号控制，第二和第三开关由与第一振荡器信号相差180°的第二振荡器信号控制。

公开(公告)号：US20110300818A1

公开(公告)日：2011-12-08

申请号：US13076262

申请日：2011-03-30

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04W88/02

CPC分类号： H03H7/40 ,  H03H19/008 ,  H04B2001/0491 ,  H04W88/02

摘要： A SAW-less transmitter includes an up-conversion mixing module, a frequency translated BPF (FTBPF), an output module, and a power amplifier driver. The up-conversion mixing module converts an outbound symbol stream into an up-converted signal. The FTBPF frequency translates a baseband filter response to an RF bandpass filter response and filter the up-converted signal in accordance with the RF bandpass filter response to produce a filtered up-converted signal. The output module conditions the filtered up-converted signal to produce a conditioned up-converted signal. The power amplifier driver amplifies the conditioned up-converted signal to produce an outbound RF signal.

摘要翻译： 无SAW发射机包括上变频混频模块，频率转换BPF（FTBPF），输出模块和功率放大器驱动器。 上变频混频模块将出站符号流转换为上变频信号。 FTBPF频率将基带滤波器响应转换为RF带通滤波器响应，并根据RF带通滤波器响应对上变频信号进行滤波，以产生滤波的上变频信号。 输出模块对滤波的上变频信号进行调节，以产生调节的上变频信号。 功率放大器驱动器放大经调节的上变频信号以产生出站RF信号。

公开(公告)号：US20110300810A1

公开(公告)日：2011-12-08

申请号：US13152560

申请日：2011-06-03

申请人： MOHYEE MIKHEMAR ,  HOOMAN DARABI

发明人： MOHYEE MIKHEMAR ,  HOOMAN DARABI

IPC分类号： H04W88/02 ,  H01P1/20

CPC分类号： H03H7/46 ,  H03D2200/0074 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/534 ,  H03H7/40 ,  H03H19/008 ,  H03H2011/0494

摘要： A transceiver includes a local oscillation module, a transmitter section, and a receiver section. The local oscillation module is operable to generate a transmit local oscillation and a receive oscillation. The transmitter section includes a transmit mixing module and a transmit weaved connection that is operable to high frequency filter the transmit location oscillation. The transmit mixing module mixes the filtered transmit location oscillation with a transmit signal to produce an up-converted signal. The receiver section includes a receive mixing module and a receive weaved connection that is operable to high frequency filter the receive location oscillation. The receive mixing module mixes the filtered receive location oscillation with an RF received signal to produce a down-converted signal.

摘要翻译： 收发机包括本地振荡模块，发射机部分和接收机部分。 本地振荡模块可操作以产生发射本地振荡和接收振荡。 发射机部分包括发射混合模块和可操作以对发射位置振荡进行高频滤波的发射编织连接。 发射混合模块将滤波的发射位置振荡与发射信号混合，以产生上变频信号。 接收器部分包括接收混合模块和接收编织连接，其可操作以对接收位置振荡进行高频滤波。 接收混合模块将经滤波的接收位置振荡与RF接收信号混合以产生下变频信号。

公开(公告)号：US08027799B2

公开(公告)日：2011-09-27

申请号：US11946614

申请日：2007-11-28

申请人： Robert J. Thomas ,  Michael L. Underhill

发明人： Robert J. Thomas ,  Michael L. Underhill

IPC分类号： G01R35/00

CPC分类号： H03H19/008 ,  H03H11/24

摘要： A system or circuit for simulating a potentiometer, thermistor, or the like. A pulse stream, having a duty cycle which is varied as a changing pulse width or as a differing number of time slices per time period, may be input to the system. The pulse stream to a transistor or switch-like mechanism may allow a controlled connection of a fixed value resistor to a reference voltage or ground to provide various resultant values of impedance or resistance. A measuring circuit connected to the output of the system may determine a value which is of the fixed value resistor divided by the duty cycle of the pulse train effectively controlling the connection of the resistor to ground. One or more additional circuits may be connected in parallel to achieve greater accuracy.

摘要翻译： 用于模拟电位计，热敏电阻等的系统或电路。 可以向系统输入具有作为变化的脉冲宽度或每个时间段的不同数量的时间片而变化的占空比的脉冲流。 到晶体管或类似开关的机构的脉冲流可以允许固定值电阻器与参考电压或接地的受控连接，以提供阻抗或电阻的各种结果值。 连接到系统的输出的测量电路可以确定固定值电阻器的值除以脉冲串的占空比，有效地控制电阻器与地的连接。 一个或多个附加电路可以并联连接以实现更高的精度。

公开(公告)号：US20110101950A1

公开(公告)日：2011-05-05

申请号：US12994997

申请日：2008-05-28

申请人： Samuel M. Babb

发明人： Samuel M. Babb

IPC分类号： G05F5/00

CPC分类号： H03H19/008 ,  H02M3/156

摘要： One embodiment of an impedance stabilizer for use with a switching voltage regulator supplied by a source of an electrical voltage has an impedance and a switch controllable to permit current from a source to flow through the impedance. Control circuitry to operate the switch cyclically with a controlled duty cycle is responsive to variations in the voltage of the source having a frequency lower than a cycle rate of the switch to increase the duty cycle of the switch as the voltage of the source increases.

摘要翻译： 用于由电压源提供的开关电压调节器的阻抗稳定器的一个实施例具有可控制的阻抗和开关，以允许来自源的电流流过阻抗。 以受控工作周期循环地操作开关的控制电路响应于具有低于开关的周期速率的频率的源的电压的变化，以在源的电压增加时增加开关的占空比。

公开(公告)号：US07890076B2

公开(公告)日：2011-02-15

申请号：US11551464

申请日：2006-10-20

申请人： Sven Mattisson ,  Magnus Nilsson ,  Andreas Nydahl ,  Thomas Mattsson

发明人： Sven Mattisson ,  Magnus Nilsson ,  Andreas Nydahl ,  Thomas Mattsson

IPC分类号： H04B1/26

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0023 ,  H03D2200/0084 ,  H03H19/008

摘要： A method of providing an input signal to a mixer circuit comprises coupling an output signal from a low-noise amplifier circuit to a mixer input of the mixer circuit via an AC coupling circuit, comprising an inductive of capacitive coupling circuit. For capacitive coupling configurations, a coupling capacitor is configured to have a capacitance value determined as a function of a transconductance sensitivity of the mixer circuit. For balanced output configurations of the low-noise amplifier circuit, matched coupling capacitors are used for coupling the balanced output signals to respective inputs of the mixer circuit. In one embodiment, the mixer circuit comprises a quadrature mixer circuit, which may be in a balanced or double-balanced configuration. In another embodiment, the mixer circuit comprises a four-phase mixer circuit, which may be configured as a balanced four-phase mixer circuit coupled to the low-noise amplifier circuit via inductive or capacitive embodiments of the coupling circuit.

摘要翻译： 一种向混频器电路提供输入信号的方法包括：通过AC耦合电路将来自低噪声放大器电路的输出信号耦合到混频器电路的混频器输入，该AC耦合电路包括电容耦合电路的电感。 对于电容耦合配置，耦合电容器被配置为具有根据混频器电路的跨导灵敏度确定的电容值。 对于低噪声放大器电路的平衡输出配置，匹配的耦合电容用于将平衡输出信号耦合到混频器电路的相应输入。 在一个实施例中，混频器电路包括正交混频器电路，其可以是平衡或双平衡配置。 在另一个实施例中，混频器电路包括四相混频器电路，其可以被配置为通过耦合电路的电感或电容实施例耦合到低噪声放大器电路的平衡四相混频器电路。

公开(公告)号：US20070218856A1

公开(公告)日：2007-09-20

申请号：US11378159

申请日：2006-03-17

申请人： Sami Vilhonen

发明人： Sami Vilhonen

IPC分类号： H04B1/26

CPC分类号： H04B1/28 ,  H03H19/008

摘要： A receiving method, a transceiver and a receiver are provided. The receiver comprises an antenna for receiving a radio frequency signal, a local oscillator, an amplifier for amplifying the received signal, a phase shifter connected between the antenna and the amplifier, the phase shifter converting a high impedance at one end of the phase shifter to a low impedance at the other end, and vice versa. The receiver further comprises a filter, the frequency response of the filter being determined on a frequency related to the frequency of the local oscillator, the filter comprising a switching arrangement which converts the frequency response to radio frequency.

摘要翻译： 提供接收方法，收发机和接收机。 接收机包括用于接收射频信号的天线，本地振荡器，用于放大接收信号的放大器，连接在天线和放大器之间的移相器，将移相器的一端的高阻抗转换为 另一端的低阻抗，反之亦然。 接收机还包括滤波器，滤波器的频率响应是根据与本地振荡器的频率有关的频率来确定的，该滤波器包括一个将频率响应转换成射频的切换装置。