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1. 发明申请

US20190215030A1 ENERGY EFFICIENT ULTRA-WIDEBAND IMPULSE RADIO SYSTEMS AND METHODS 审中-公开
公开(公告)号：US20190215030A1
公开(公告)日：2019-07-11
申请号：US16325416
申请日：2018-06-29
申请人： TRANSFERT PLUS SOCIETE EN COMMANDITE
发明人： FREDERIC NABKI , DOMINIC DESLANDES , MOHAMMAD TAHERZADEH-SANI , MICHIEL SOER , RABIA RASSIL
IPC分类号： H04B1/719 , H04B1/7183 , H04B1/7163
CPC分类号： H04B1/719 , G06K7/10306 , H03H19/002 , H04B1/10 , H04B1/7163 , H04B1/71637 , H04B1/7183 , H04B2201/71634 , H04W56/00
摘要： Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Such UWB systems through their receivers may operate in the presence of interfering signals and should provide for robust communications. Accordingly, an accurate and sharp filter that operates at low power is required and beneficially one that does not require a highly accurate power heavy clock. Further, many UWB applications require location and/or range finding of other elements and it would therefore be beneficial to provide a UWB based range finding and/or location capability removing the requirement to add additional device complexity and, typically significant, power consumption.

2. 发明申请

US20180278441A1 MULTIPATH FILTERS 审中-公开
公开(公告)号：US20180278441A1
公开(公告)日：2018-09-27
申请号：US15902190
申请日：2018-02-22
申请人： SKYWORKS SOLUTIONS, INC.
发明人： Alexander John Heaslip Ross , John William Mitchell Rogers
IPC分类号： H04L25/03 , H04B1/16
CPC分类号： H04L25/03828 , H03H19/002 , H04B1/16 , H04L25/03114
摘要： Multipath filters are provided herein. In certain configurations, a multipath filter includes multiple filter paths or circuit branches that are electrically connected in parallel with one another between an input terminal and an output terminal. The input terminal receives an input signal, and each filter circuit branch includes a double-in double-switched (DIDS) downconverter that downconverts the input signal with two different clock signal phases to generate a downconverted signal. Each filter circuit branch further includes a filter network that generates a filtered signal by filtering the downconverted signal and an upconverter that upconverts the filtered signal to generate a branch output signal. Additionally, the branch output signals from the filter circuit branches are combined to generate an output signal at the output terminal.

3. 发明授权

US09871487B2 Harmonic rejection translational filter 有权
公开(公告)号：US09871487B2
公开(公告)日：2018-01-16
申请号：US15125148
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 , H03D7/04 , H03D7/14 , H03H11/04
CPC分类号： H03D7/1483 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D2200/0086 , H03H11/0405 , H03H11/0466 , H03H19/002
摘要： A harmonic translational filter includes a first path, a second path and a signal combiner. The first path has a first translational filter that is driven by a plurality of first oscillation signals, and is arranged to generate a first output signal according to an input signal. The second path has a second translation filter that is driven by a plurality of second oscillation signals that are different from the first oscillation signals in phase. The second path is coupled to the first path and arranged to generate a second output signal according to the input signal. The signal combiner is coupled to the first path and the second path, and arranged to combine the first output signal and the second output signal to generate a filtered signal.

4. 发明授权

US09130532B2 Tunable RF channel select filter 有权
标题翻译：可调RF通道选择滤波器
公开(公告)号：US09130532B2
公开(公告)日：2015-09-08
申请号：US14104233
申请日：2013-12-12
申请人： Nokia Corporation
发明人： Md. Naimul Hasan , Sudhir Aggarwal
IPC分类号： H03H7/42 , H03H7/01 , H03H7/06 , H03H11/04
CPC分类号： H03H7/0161 , H03H7/06 , H03H7/17 , H03H7/42 , H03H11/0422 , H03H19/002 , H03H19/004 , H03H2007/013 , H03H2210/012
摘要： Methods and apparatus, including computer program products, are provided for RF filtering. Related apparatus, systems, methods, and articles are also described.
摘要翻译：提供了用于RF过滤的方法和设备，包括计算机程序产品。还描述了相关装置，系统，方法和制品。

5. 发明申请

US20150133068A1 TUNABLE RF N-PATH FILTER 有权
标题翻译： TUNABLE射频N路径滤波器
公开(公告)号：US20150133068A1
公开(公告)日：2015-05-14
申请号：US14077072
申请日：2013-11-11
申请人： Nokia Corporation
发明人： Sudhir Aggarwal , Hasan Md-Naimal
IPC分类号： H04L27/148 , H04J3/02
CPC分类号： H04L27/148 , H03H19/002 , H04J3/025
摘要： Methods and apparatus, including computer program products, are provided for tunable filters. In one aspect there is provided an apparatus. The apparatus may include a bandpass filter comprising a resistive-capacitive configuration of N-path filters tunable to a first center frequency based on at least a first clock frequency; a notch filter comprising a capacitive-resistive configuration of N-path filters tunable to a second center frequency based on at least a second clock frequency; and a combiner coupled to the bandpass filter and the notch filter to combine a bandpass output signal provided by the bandpass filter and a notch output signal provided by the notch filter, wherein the combiner outputs a combined output. Related apparatus, systems, methods, and articles are also described.
摘要翻译：为可调谐滤波器提供了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。该装置可以包括带通滤波器，其包括基于至少第一时钟频率可调谐到第一中心频率的N路径滤波器的电阻电容配置; 陷波滤波器，其包括基于至少第二时钟频率可调谐到第二中心频率的N路径滤波器的电容电阻配置; 以及耦合到带通滤波器和陷波滤波器的组合器，以组合由带通滤波器提供的带通输出信号和由陷波滤波器提供的陷波输出信号，其中组合器输出组合输出。还描述了相关装置，系统，方法和制品。

6. 发明申请

US20130335163A1 METHODS AND APPARATUSES FOR IMPLEMENTING VARIABLE BANDWIDTH RF TRACKING FILTERS FOR RECONFIGURABLE MULTI-STANDARD RADIOS 有权
标题翻译：用于实现可重新配置的多标准无线电的可变带宽射频跟踪滤波器的方法和装置
公开(公告)号：US20130335163A1
公开(公告)日：2013-12-19
申请号：US13852512
申请日：2013-03-28
申请人： Nokia Corporation
发明人： Sudhir AGGARWAL , Xiao Xiao
IPC分类号： H03H7/12
CPC分类号： H03H7/12 , H03H19/002
摘要： A variable bandwidth filter comprises a first filter branch in parallel with a second filter branch. The first filter branch comprises a first resistance in series with an input and a first output, and N parallel paths across the first output, each path comprising a corresponding capacitor in series with a corresponding switch and a common terminal. The second filter branch comprises a second resistance in series with the input and a second output, and N parallel paths across the second output, each path comprising an RC network in series with a switch and a common terminal. A clock tunes the first and second filter branches to a center frequency by controlling the switches of the first and second filter branches. A combiner produces a difference signal comprising a difference between the output of the first filter branch and the output of the second filter branch to provide a filter output having an adjustable bandwidth with reference to a center frequency. The bandwidth is adjusted by changing a value of at least one resistor or at least one capacitor in one or more of the first filter branch or the second filter branch.
摘要翻译：可变带宽滤波器包括与第二滤波器分支并联的第一滤波器分支。第一滤波器分支包括与输入和第一输出串联的第一电阻，以及横跨第一输出的N个并行路径，每个路径包括与相应开关和公共端子串联的相应电容器。第二滤波器分支包括与输入和第二输出串联的第二电阻，以及跨越第二输出的N个并行路径，每个路径包括与开关和公共端子串联的RC网络。时钟通过控制第一和第二滤波器分支的开关来调谐第一和第二滤波器分支到中心频率。组合器产生包括第一滤波器分支的输出与第二滤波器分支的输出之间的差异的差分信号，以提供具有参考中心频率的可调节带宽的滤波器输出。通过在第一滤波器分支或第二滤波器分支中的一个或多个中改变至少一个电阻器或至少一个电容器的值来调整带宽。

7. 发明申请

US20130235959A1 Filter 有权
公开(公告)号：US20130235959A1
公开(公告)日：2013-09-12
申请号：US13777601
申请日：2013-02-26
申请人： RENESAS MOBILE CORPORATION
发明人： Markus Rudiger NENTWIG
IPC分类号： H04B1/10
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.

8. 发明授权

US4696055A RF tuning circuit which provides image frequency rejection 失效
标题翻译：提供图像频率抑制的RF调谐电路
公开(公告)号：US4696055A
公开(公告)日：1987-09-22
申请号：US809694
申请日：1985-12-17
申请人： Christopher B. Marshall
发明人： Christopher B. Marshall
IPC分类号： H04B1/10 , H03C1/60 , H03D1/24 , H03H11/04 , H03H19/00 , H04B1/18 , H04B1/26 , H04B1/04
CPC分类号： H03H19/002 , H03C1/60 , H03D1/24 , H03H11/04
摘要： A radio frequency tuning circuit, for use in a transmitter or receiver, which rejects image frequencies of the frequency band of a supplied RF signal to which it is tuned. The circuit comprises an N-path filter and a feedback loop connecting the output of such filter to the input of an RF amplifier to which the RF signal is applied. The filter includes a tunable local oscillator and a pair of quadrature related signal paths including mixers therein driven by such oscillator, the outputs of such paths being combined by a summing amplifier which produces the output RF signal. The output of the summing amplifier is also supplied to the feedback path, causing the center frequency of the transfer characteristic of the N-path filter to be displaced from the local oscillator frequency. The RF output signal thereby includes substantially only single sideband of the signals produced by the two signal paths.
摘要翻译：用于发射机或接收机的射频调谐电路，其拒绝所调谐的所提供的RF信号的频带的图像频率。该电路包括N路径滤波器和将这种滤波器的输出连接到施加RF信号的RF放大器的输入的反馈环路。滤波器包括可调本地振荡器和一对正交相关信号路径，包括由这种振荡器驱动的混频器，这些路径的输出由产生输出RF信号的求和放大器组合。加法放大器的输出也提供给反馈路径，使得N路径滤波器的传输特性的中心频率从本地振荡器频率偏移。因此，RF输出信号基本上仅包括由两个信号路径产生的信号的单个边带。

9. 发明授权

US4518936A Commutating filter passing only the fundamental frequency and odd harmonics thereof 失效
标题翻译：换向滤波器仅通过其基频和奇次谐波
公开(公告)号：US4518936A
公开(公告)日：1985-05-21
申请号：US551587
申请日：1983-11-14
申请人： Eldon M. Sutphin, Jr.
发明人： Eldon M. Sutphin, Jr.
IPC分类号： H03H19/00 , H03H11/04
CPC分类号： H03H19/002
摘要： A commutating filter circuit producing only the fundamental frequency and odd harmonics of an input signal comprises first and second commutating filters each connected to receive the input signal and coupled to pass an output signal to the non-inverting and inverting terminals, respectively, of a differential amplifier. The first filter comprises N stages, each having a time constant of RC and a filter sampling frequency of f.sub.1. The second filter comprises N/2 stages, each having a time constant of 2RC and a filter sampling frequency of 2f.sub.1. The resultant signal from the differential amplifier contains only the fundamental frequencies and odd harmonics of the input signal.
摘要翻译：仅产生输入信号的基频和奇次谐波的换向滤波器电路包括第一和第二换向滤波器，每个滤波器被连接以接收输入信号并被耦合以将输出信号分别传递到差分的非反相和反相端子放大器第一滤波器包括N个级，每个级具有RC的时间常数和f1的滤波器采样频率。第二滤波器包括N / 2级，每级具有2RC的时间常数和2f1的滤波器采样频率。来自差分放大器的合成信号仅包含输入信号的基频和奇次谐波。

10. 发明授权

US4392068A Capacitive commutating filter 失效
标题翻译：电容换向滤波器
公开(公告)号：US4392068A
公开(公告)日：1983-07-05
申请号：US284157
申请日：1981-07-17
申请人： Kenneth B. Welles, II
发明人： Kenneth B. Welles, II
IPC分类号： H03H19/00 , H03K5/24 , H03D13/00 , H03K5/26
CPC分类号： H03H19/002
摘要： A capacitive commutating filter provides a D. C. output voltage of amplitude responsive to the amplitude of an input waveform having a frequency substantially equal to the operating frequency of the filter. The filter operating frequency is established by a digital signal. The filter input is selectively and cyclically connected through N input resistances, wherein N is an integer greater than zero, to adjacently progressive N ones of (2N+1) nodes, each having one of (2N+1) capacitive filter elements connected to ground potential. The equilibrium voltages across the capacitive filter elements, established during the N/(2N+1) segments of the input waveform during which each capacitor is connected to the input, are coupled to one set each of maximum-positive-polarity and maximum-negative-polarity diodes, for placing the maximum and minimum filter capacitive element voltages at respective ones of the inverting and non-inverting inputs of a differential amplifier, having the output thereof forming the filter output.
摘要翻译：电容换向滤波器响应于具有基本上等于滤波器的工作频率的频率的输入波形的振幅，提供D.C输出的幅度电压。滤波器工作频率由数字信号建立。滤波器输入通过N个输入电阻（其中N是大于零的整数）选择性地和循环地连接到（2N + 1）个节点的相邻行进的N个（每个具有连接到地的（2N + 1）个电容滤波器元件之一潜在。在每个电容器连接到输入端的输入波形的N /（2N + 1）段期间建立的电容滤波器元件之间的平衡电压被耦合到每组最大正极性和最大负值极性二极管，用于将最大和最小滤波电容元件电压放置在差分放大器的反相和非反相输入的相应位置处，其输出形成滤波器输出。

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