专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US10084433B2 Feedforward filter using translational filter 有权
公开(公告)号：US10084433B2
公开(公告)日：2018-09-25
申请号：US15125145
申请日：2015-03-13
申请人： MEDIATEK INC.
发明人： Ying-Tsang Lu , Chih-Ming Hung , Meng-Chang Lee
IPC分类号： H03K5/00 , H03H19/00 , H04L25/02 , H03D7/16
CPC分类号： H03H19/002 , H03D7/165 , H04L25/0278
摘要： In accordance with an embodiment, a feedforward filter includes a first path, at least one second path and a signal combiner. The first path has a first translational filter, and employed for providing a first frequency response and generating a first output in response to an input signal based on the first frequency response. The at least one second path has a second translational filter and is coupled to the first path. The at least one second path is employed for providing a second frequency response that is different from the first frequency response to the input signal, and generating at least one second output in response to the input signal based on the second frequency response. The signal combiner is coupled to the first path and the second path, and employed for combining the first output and the at least one second output to generate a filtered signal.

2. 发明申请

US20170250677A1 CIRCUITS AND METHODS FOR TRANSCEIVER SELF-INTERFERENCE CANCELLERS 审中-公开
公开(公告)号：US20170250677A1
公开(公告)日：2017-08-31
申请号：US15515823
申请日：2015-10-01
申请人： Jin Zhou , Harish Krishnaswamy
发明人： Jin Zhou , Harish Krishnaswamy
IPC分类号： H03H19/00 , H04L25/03 , H04B1/38 , H03H11/04 , H04B17/336
CPC分类号： H03H19/002 , H03H2210/021 , H03H2210/025 , H03H2210/028 , H04B1/525 , H04B17/104 , H04B17/336 , H04L25/03006
摘要： Self-interference cancellers are provided. The self-interference cancellers can include multiple second-order, N-path Gm-C filters. Each filter can be configured to cancel self-interference on a channel of a desired bandwidth. Each filter can be independently controlled using a variable transmitter resistance, a variable receiver resistance, a variable baseband capacitance, a variable transconductance, and a variable time shift between local oscillators that control switches in the filter. By controlling these variables, magnitude, phase, slope of magnitude, and slope of phase of the cancellers frequency responses can be controlled for self-interference cancellation. A calibration process is also provided for configuring the canceller.

3. 发明申请

US20170222628A1 N-PATH FILTERS WITH FLATTER FREQUENCY RESPONSE 有权
公开(公告)号：US20170222628A1
公开(公告)日：2017-08-03
申请号：US15014305
申请日：2016-02-03
申请人： QUALCOMM Incorporated
发明人： Milad DARVISHI , Hajir HEDAYATI , Faramarz SABOURI
IPC分类号： H03H19/00
CPC分类号： H03H19/002
摘要： Certain aspects of the present disclosure provide N-path filters with wider passbands and steeper rejection than conventional N-path filters with only a single pole in each filter path. These N-path filters also have a flatter passband with decreased passband droop. One example N-path filter generally includes a plurality of branches selectively connected with a common node, each branch of the N-path filter comprising a switch connected in series with an impedance comprising a common drain amplifier circuit. In certain aspects, the amplifier circuit may include a degeneration circuit for stability and/or a poly-phase feedback circuit to reduce in-band peaking.

4. 发明申请

US20170005385A1 SWITCH TOPOLOGY FOR SWITCHING FILTERS MULTIPLEXERS 有权
标题翻译：用于切换过滤器的交换机的开关拓扑
公开(公告)号：US20170005385A1
公开(公告)日：2017-01-05
申请号：US15010829
申请日：2016-01-29
申请人： RF Micro Devices, Inc.
发明人： Nadim Khlat , Marcus Granger-Jones
IPC分类号： H01P1/15 , H01P1/213
CPC分类号： H03H19/002 , H03H7/465 , H03H2250/00 , H04B1/006
摘要： This disclosure relates to radio frequency (RF) front end circuitry used to route RF signals. In one embodiment, the RF front end circuitry has a filter circuit and a switch device. The switch device includes a common port, an RF port, and switchable path connected in series between the common port and the RF port. The switch device is configured to present approximately the filter capacitance of the filter circuit at the common port when the switchable path is closed. However, when the switchable path is open, the switch device is configured to present a device capacitance at the common port that is approximately equal to the filter capacitance of the filter circuit. In this manner, if the common port is connected to an antenna, the capacitance seen by the antenna from the common port remains substantially unchanged regardless of which of the switchable path is opened or closed.
摘要翻译：本公开涉及用于路由RF信号的射频（RF）前端电路。在一个实施例中，RF前端电路具有滤波器电路和开关装置。开关装置包括在公共端口和RF端口之间串联连接的公共端口，RF端口和可切换路径。开关装置被配置为当可切换路径闭合时，在公共端口处大致呈现滤波器电路的滤波电容。然而，当可切换路径打开时，开关装置被配置为在公共端口处呈现近似等于滤波器电路的滤波器电容的器件电容。以这种方式，如果公共端口连接到天线，则天线从公共端口看到的电容保持基本上不变，而不管可切换路径中哪一个被打开或关闭。

5. 发明申请

US20160269042A1 RECEIVER FOR SIMULTANEOUS SIGNALS IN CARRIER AGGREGATION 有权
标题翻译：接收器用于携带者聚合中的同时信号
公开(公告)号：US20160269042A1
公开(公告)日：2016-09-15
申请号：US14931665
申请日：2015-11-03
申请人： Nokia Technologies Oy
发明人： Chadi Jabbour , Seyed Majid Homayouni , Sudhir Aggarwal , Vason P. Srini
IPC分类号： H03M3/00
CPC分类号： H03M3/406 , H03H19/002 , H03M3/30 , H03M3/462 , H04L5/001
摘要： Methods and apparatus, including computer program products, are provided for receivers. In one aspect there is provided an apparatus. The apparatus may include an in-phase sigma delta receiver coupled to a radio frequency input port providing at least a first carrier aggregation signal and a second carrier aggregation signal; and a quadrature phase sigma delta receiver coupled to the radio frequency input port providing at least the first carrier aggregation signal and the second aggregation signal, wherein the in-phase sigma delta receiver and the quadrature phase sigma delta receiver each include a resonator stage circuitry including at least one variable capacitor that varies notch frequencies to provide passbands for the first carrier aggregation signal and the second carrier aggregation signal. 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。该装置可以包括耦合到射频输入端口的至少提供第一载波聚合信号和第二载波聚合信号的同相Σ-Δ接收机; 以及耦合到所述射频输入端口的至少提供所述第一载波聚合信号和所述第二聚合信号的正交相位Σ-Δ接收器，其中所述同相Σ-Δ接收器和所述正交相位Σ-Δ接收器均包括谐振器级电路，所述谐振器级电路包括至少一个可变电容器，其改变陷波频率以提供第一载波聚合信号和第二载波聚合信号的通带。还描述了相关装置，系统，方法和制品。

6. 发明授权

US09444431B2 Ultra-low-voltage current-reuse voltage-controlled oscillator and transconductance-capacitor filter 有权
标题翻译：超低压电流复用压控振荡器和跨导电容滤波器
公开(公告)号：US09444431B2
公开(公告)日：2016-09-13
申请号：US14989040
申请日：2016-01-06
申请人： University of Macau
发明人： Pui-In Mak , Zhicheng Lin , Rui Paulo da Silva Martins
IPC分类号： H03K5/00 , H03B5/12 , H03H11/04
CPC分类号： H03H11/0472 , H03B5/1237 , H03B5/1246 , H03B2202/06 , H03F1/0205 , H03F3/19 , H03F3/45076 , H03F2200/294 , H03F2200/451 , H03H11/1291 , H03H19/002 , H03H19/004 , H03H2011/0483 , H03H2210/025 , H04B1/16 , H04B1/1638
摘要： According to one aspect of the present disclosure, an ultra-low voltage current reused voltage-controlled oscillator and transconductance-capacitor filter is provided. The circuit includes a voltage-controlled oscillator stacked atop a transconductance-capacitor filter. The voltage-controlled oscillator includes a node one, a node two, a node three, a node four, an inductance, a variable capacitor, a first switched element, a second switched element, a third switched element, and a fourth switched element. The transconductance-capacitor filter includes a first resistor, a second resistor, a fifth switched element, a sixth switched element, a seventh switched element, and an eighth switched element.
摘要翻译：根据本公开的一个方面，提供了一种超低电压电流重用压控振荡器和跨导电容滤波器。该电路包括堆叠在跨导 - 电容滤波器顶上的压控振荡器。压控振荡器包括节点1，节点2，节点3，节点4，电感，可变电容器，第一开关元件，第二开关元件，第三开关元件和第四开关元件。跨导电容滤波器包括第一电阻器，第二电阻器，第五开关元件，第六开关元件，第七开关元件和第八开关元件。

7. 发明申请

US20160233848A1 ULTRA-LOW-VOLTAGE CURRENT-REUSE VOLTAGE-CONTROLLED OSCILLATOR AND TRANSCONDUCTANCE-CAPACITOR FILTER 有权
标题翻译：超低电流电流 - 电压控制振荡器和跨导电容滤波器
公开(公告)号：US20160233848A1
公开(公告)日：2016-08-11
申请号：US14989040
申请日：2016-01-06
申请人： University of Macau
发明人： Pui-In MAK , Zhicheng LIN , Rui Paulo da Silva MARTINS
IPC分类号： H03H11/04
CPC分类号： H03H11/0472 , H03B5/1237 , H03B5/1246 , H03B2202/06 , H03F1/0205 , H03F3/19 , H03F3/45076 , H03F2200/294 , H03F2200/451 , H03H11/1291 , H03H19/002 , H03H19/004 , H03H2011/0483 , H03H2210/025 , H04B1/16 , H04B1/1638
摘要： According to one aspect of the present disclosure, an ultra-low voltage current reused voltage-controlled oscillator and transconductance-capacitor filter is provided. The circuit includes a voltage-controlled oscillator stacked atop a transconductance-capacitor filter. The voltage-controlled oscillator includes a node one, a node two, a node three, a node four, an inductance, a variable capacitor, a first switched element, a second switched element, a third switched element, and a fourth switched element. The transconductance-capacitor filter includes a first resistor, a second resistor, a fifth switched element, a sixth switched element, a seventh switched element, and an eighth switched element.
摘要翻译：根据本公开的一个方面，提供了一种超低电压电流重用压控振荡器和跨导电容滤波器。该电路包括堆叠在跨导 - 电容滤波器顶上的压控振荡器。压控振荡器包括节点1，节点2，节点3，节点4，电感，可变电容器，第一开关元件，第二开关元件，第三开关元件和第四开关元件。跨导电容滤波器包括第一电阻器，第二电阻器，第五开关元件，第六开关元件，第七开关元件和第八开关元件。

8. 发明授权

US09112566B2 Filter 有权
标题翻译：过滤
公开(公告)号：US09112566B2
公开(公告)日：2015-08-18
申请号：US13777601
申请日：2013-02-26
申请人： Broadcom Corporation
发明人： Markus Rudiger Nentwig
IPC分类号： H04B1/10 , H03H19/00
CPC分类号： H04B1/10 , H03H19/002 , H03H19/008
摘要： An apparatus and method suppress unwanted signal components in receiving signals during wireless communication. A first circuitry is arranged to process a first signal, a second circuitry is arranged to apply transferred impedance filtering on a second signal according to a filter clock frequency, a signal branching circuitry is arranged to branch an input signal into the first circuitry and the second circuitry, and a signal combining circuitry is arranged to combine the processed first signal and the filtered second signal such that signal components of the first signal processed in the first circuitry and the filtered second signal are in-phase for signal frequencies equal to the filter clock frequency.
摘要翻译：一种装置和方法在无线通信期间抑制接收信号中的不需要的信号分量。第一电路被布置成处理第一信号，第二电路被布置为根据滤波器时钟频率对第二信号施加传输阻抗滤波，信号分支电路被布置成将输入信号分支到第一电路中，而第二电路电路和信号组合电路被布置为组合经处理的第一信号和经滤波的第二信号，使得在第一电路中处理的第一信号和经滤波的第二信号的信号分量与等于滤波器时钟的信号频率同相频率。

9. 发明申请

US20130336342A1 Method and Device For Implementing Tracking Filters and RF Front End of Software Defined Radios 有权
标题翻译：用于实现跟踪滤波器的方法和设备以及软件定义无线电的RF前端
公开(公告)号：US20130336342A1
公开(公告)日：2013-12-19
申请号：US13495489
申请日：2012-06-13
申请人： Sudhir Aggarwal
发明人： Sudhir Aggarwal
IPC分类号： H04J3/02
CPC分类号： H03H19/002
摘要： A tracking circuit has first and second filters controlled by clock signals and a combiner. Each filter has N paths in parallel between an input and an output, each path comprising a respective first/second sub-circuit and a switch (N is an integer >1). The clock signals selectively control each of the N switches of the first and second filters at a same frequency, and in variously described embodiments the first and second on-time durations may be different, the first and second sub-circuits may be different, or both first/second on-time durations and first/second sub-circuits may be different. Signals output from the first and second filter are added at a combiner. In certain examples each path in the first and second filter is controlled by same-phase clock signals, and every path on either filter are controlled with different-phase clock signals.
摘要翻译：跟踪电路具有由时钟信号和组合器控制的第一和第二滤波器。每个滤波器在输入和输出之间并联有N个路径，每个路径包括相应的第一/第二子电路和开关（N是整数> 1）。时钟信号以相同的频率选择性地控制第一和第二滤波器的N个开关中的每一个，并且在各种描述的实施例中，第一和第二导通时间可以不同，第一和第二子电路可以不同，或者第一/第二导通时间和第一/第二子电路都可以不同。在组合器处添加从第一和第二滤波器输出的信号。在某些示例中，第一和第二滤波器中的每个路径由同相时钟信号控制，并且任一滤波器上的每个路径由不同相位的时钟信号控制。

10. 发明申请

US20130271210A1 N-PATH FILTER WITH COUPLING BETWEEN PATHS 审中-公开
标题翻译： N-PATH过滤器与PATHS之间的耦合
公开(公告)号：US20130271210A1
公开(公告)日：2013-10-17
申请号：US13996572
申请日：2011-12-23
申请人： Thomas Riley
发明人： Thomas Riley
IPC分类号： H03H11/04 , H03H7/01
CPC分类号： H03H11/04 , H03H7/0138 , H03H19/002
摘要： An N-path filter with each path forming a different filter. A signal insertion block is provided at the start of the circuit and, in one embodiment, multiple memory capacitors are coupled to the signal insertion block. A bank of sequential rotating capacitors are provided along with a bank of switches. By activating selected switches, any of the memory capacitors can be coupled to selected rotating capacitors. A different filter subcircuit is formed by coupling each memory capacitor to different rotating capacitors as this creates a different signal path. By timing the switching of the rotating capacitors, signals from previous outputs can be inserted into the circuit. At the output end of the circuit, the output of the different filter subcircuits is put together into an output for the whole circuit.
摘要翻译：每个路径形成不同过滤器的N路径过滤器。在电路的起始处提供信号插入块，并且在一个实施例中，多个存储器电容器耦合到信号插入块。一组顺序旋转电容器与一组开关一起提供。通过激活所选择的开关，可以将任何存储电容器耦合到选定的旋转电容器。通过将每个存储电容器耦合到不同的旋转电容器来形成不同的滤波器分支电路，因为这创建了不同的信号路径。通过定时旋转电容器的切换，来自先前输出的信号可以插入电路。在电路的输出端，将不同滤波器子电路的输出放在整个电路的输出端。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式