公开(公告)号：US09306531B2

公开(公告)日：2016-04-05

申请号：US14199839

申请日：2014-03-06

申请人： Linear Technology Corporation

发明人： Petrus Martinus Stroet

IPC分类号： H03H7/03 ,  H03H7/01

CPC分类号： H03H7/0138 ,  H03H7/03 ,  H03H7/06 ,  H03H11/0427 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/036

摘要： A tunable and trimmable analog filter may include a tunable analog filter and a trimming circuit. The tunable analog filter may set the frequency of a characteristic of the tunable analog filter based on a digital tuning signal that is indicative of a desired frequency of the characteristic. However, the tunable analog filter may contain components having values that deviate from specified values due to var during manufacture of the tunable analog filter. The value deviations can cause the frequency of the characteristic not to precisely match the frequency indicated by the digital tuning signal. The trimming circuit may include a non-volatile memory that contains data. The trimming circuit may receive tuning information indicative of a desired frequency for the characteristic of the tunable analog filter. The trimming circuit may generate the digital tuning signal by trimming the tuning information to compensate for the deviations in component value and by using the data contained within the non-volatile digital memory.

摘要翻译： 可调谐和可调节模拟滤波器可以包括可调谐模拟滤波器和微调电路。 可调谐模拟滤波器可以基于指示特性的期望频率的数字调谐信号来设置可调谐模拟滤波器的特性的频率。 然而，可调模拟滤波器可以包含在可调谐模拟滤波器的制造期间由于变量而偏离指定值的值的分量。 值偏差可能导致特性频率不能精确匹配数字调谐信号所指示的频率。 修整电路可以包括包含数据的非易失性存储器。 修整电路可以接收指示可调模拟滤波器的特性的期望频率的调谐信息。 修整电路可以通过调整调谐信息来产生数字调谐信号，以补偿分量值的偏差，并通过使用包含在非易失数字存储器内的数据。

公开(公告)号：US20160036407A1

公开(公告)日：2016-02-04

申请号：US14810788

申请日：2015-07-28

申请人： lnfineon Technologies Austria AG

发明人： Elmar Bach ,  Christian Lindholm

IPC分类号： H03H7/01 ,  G05B13/02 ,  H03H7/06

CPC分类号： H03H7/06 ,  G05B13/0205 ,  H03H1/02 ,  H03H7/0138 ,  H03H7/0153 ,  H03H7/03

摘要： A circuit (290) comprises an RC filter circuit (100), which comprises an ohmic resistor (112) and a capacitor (113). In addition, the circuit (290) comprises a compensation circuit (200), which is designed to provide a compensation current flow (192), which corresponds to a current flow (191) to a load (150).

摘要翻译： 电路（290）包括RC滤波器电路（100），其包括欧姆电阻器（112）和电容器（113）。 另外，电路（290）包括补偿电路（200），其被设计成提供对应于负载（150）的电流（191）的补偿电流（192）。

公开(公告)号：US07999608B1

公开(公告)日：2011-08-16

申请号：US12496419

申请日：2009-07-01

申请人： John B. Groe ,  Lucio Marc Facchni

发明人： John B. Groe ,  Lucio Marc Facchni

IPC分类号： H03K5/00

CPC分类号： H03F1/223 ,  H03F3/195 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2200/391 ,  H03F2203/45386 ,  H03H7/03 ,  H03H7/12 ,  H03H7/1791 ,  H03H11/1213 ,  H03H11/245 ,  H03H2007/013 ,  H03H2011/0488

摘要： Apparatus and methods for providing integrated RF notch filter subsystems having enhanced Q values are described. An integrated notch filter includes an LC filter element and a Q-enhancement circuit coupled to the LC filter element, with the Q-enhancement circuit configured to offset resistive losses in the LC filter element to adjust the Q value of the filter system. A transceiver having multiple LNAs for various bands may be provided to a single notch filter system including a Q-enhancement circuit.

摘要翻译： 描述了用于提供具有增强的Q值的集成RF陷波滤波器子系统的装置和方法。 集成陷波滤波器包括耦合到LC滤波器元件的LC滤波器元件和Q增强电路，其中Q增强电路被配置为抵消LC滤波器元件中的电阻损耗以调整滤波器系统的Q值。 可以向包括Q增强电路的单陷波滤波器系统提供具有用于各种频带的多个LNA的收发器。

公开(公告)号：US20110050363A1

公开(公告)日：2011-03-03

申请号：US12312501

申请日：2007-11-15

申请人： Dominique Lo Hine Tong ,  François Baron ,  Raafat Lababidi ,  Ali Louzir

发明人： Dominique Lo Hine Tong ,  François Baron ,  Raafat Lababidi ,  Ali Louzir

IPC分类号： H03H7/12 ,  H05K13/00

CPC分类号： H03H7/0115 ,  H03H7/03 ,  H03H7/1758 ,  H03H11/52 ,  Y10T29/49002

摘要： The invention relates to a selective active low-pass filter and to a method for improving the selectivity of such a filter. The method consists in centring, in the centre of the network, the resonant element whose frequency is closest to the cut-off frequency of the filter and in inserting in series with this element a negative resistance of higher value than the parasitic resistance of the filter.

摘要翻译： 本发明涉及选择性有源低通滤波器以及提高这种滤波器的选择性的方法。 该方法是在网络的中心定心频率最接近滤波器的截止频率的谐振元件，并与该元件串联插入的电阻值高于滤波器的寄生电阻值 。

公开(公告)号：US20100323654A1

公开(公告)日：2010-12-23

申请号：US12490268

申请日：2009-06-23

申请人： Bruce A. Judson ,  Cong T. Nguyen

发明人： Bruce A. Judson ,  Cong T. Nguyen

IPC分类号： H04B1/10 ,  H03H7/06 ,  H04B1/16

CPC分类号： H04B1/1036 ,  H03F3/195 ,  H03F2200/241 ,  H03H7/03 ,  H03H7/1775 ,  H03H11/52 ,  H04B1/109

摘要： A preselect circuit maintains the dynamic range of a received RF input signal during bandpass filtering of the received RF input signal. The preselect circuit includes a Q-deficient passive bandpass filter for coupling to an antenna to receive a received RF input signal. The preselect circuit further includes a Q-enhancement circuit coupled to the Q-deficient passive bandpass filter, wherein the Q-enhancement circuit increases a Q-value of the Q-deficient passive bandpass filter by compensating for resistive inductive losses in the bandpass filter.

摘要翻译： 在接收的RF输入信号的带通滤波期间，预选电路保持接收的RF输入信号的动态范围。 预选电路包括用于耦合到天线以接收接收的RF输入信号的Q缺陷无源带通滤波器。 预选电路还包括耦合到Q缺陷无源带通滤波器的Q增强电路，其中Q增强电路通过补偿带通滤波器中的电阻感应损耗来增加Q缺陷无源带通滤波器的Q值。

公开(公告)号：US20100253558A1

公开(公告)日：2010-10-07

申请号：US12420026

申请日：2009-04-07

申请人： Pei-Wei Chen ,  Sheng-Jui Huang

发明人： Pei-Wei Chen ,  Sheng-Jui Huang

IPC分类号： H03M1/10 ,  H03K5/00

CPC分类号： H04B1/0035 ,  H03H7/0153 ,  H03H7/03

摘要： A processing apparatus for calibrating an analog filter of a communication device in a digital domain is disclosed, wherein the analog filter is arranged to perform a filtering operation upon a communication signal in an analog domain. The processing apparatus includes a signal processing circuit and a digital filter. The signal processing circuit is used for transforming the communication signal between the digital domain and the analog domain. The digital filter is coupled to the signal processing circuit, and used for performing a filtering operation upon the communication signal in the digital domain, wherein a frequency response of the digital filter is arranged to compensate a frequency response of the analog filter according to at least a compensation parameter generated with reference to a frequency-related characteristic of the analog filter.

摘要翻译： 公开了一种用于校准数字域中的通信设备的模拟滤波器的处理装置，其中模拟滤波器被布置为对模拟域中的通信信号执行滤波操作。 处理装置包括信号处理电路和数字滤波器。 信号处理电路用于对数字域和模拟域之间的通信信号进行变换。 数字滤波器耦合到信号处理电路，并用于对数字域中的通信信号执行滤波操作，其中数字滤波器的频率响应被布置为根据至少来补偿模拟滤波器的频率响应 参考模拟滤波器的频率相关特性产生的补偿参数。

公开(公告)号：US20060044055A1

公开(公告)日：2006-03-02

申请号：US10537661

申请日：2003-12-04

申请人： Masaharu Ito ,  Kenichi Maruhashi ,  Shuya Kishimoto ,  Keiichi Ohata

发明人： Masaharu Ito ,  Kenichi Maruhashi ,  Shuya Kishimoto ,  Keiichi Ohata

IPC分类号： H03K5/00

CPC分类号： H03H7/03 ,  H03B5/1852 ,  H03H7/1725 ,  H03H7/1733 ,  H03H11/28

摘要： A negative resistance circuit having a transistor and a plurality of distributed constant lines respectively connected to the three terminals of the transistor further comprises an inductive element or a capacitive element connected between the output terminal of the negative resistance circuit and the ground potential. The negative resistance is adjusted through the inductance of the inductive element or the capacitance of the capacitive element.

摘要翻译： 具有分别连接到晶体管的三个端子的晶体管和多个分布常数线路的负电阻电路还包括连接在负电阻电路的输出端子和地电位之间的电感元件或电容元件。 通过电感元件的电感或电容元件的电容来调整负电阻。

公开(公告)号：US20030141953A1

公开(公告)日：2003-07-31

申请号：US10354250

申请日：2003-01-28

发明人： James William Haslett ,  Bogdan Alexandru Georgescu ,  John Godfrey McRory ,  Holly Evelyn Pekau

IPC分类号： H01F027/28

CPC分类号： H03H7/09 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1296 ,  H03F1/02 ,  H03F1/223 ,  H03F3/191 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/537 ,  H03H7/0115 ,  H03H7/03 ,  H03H7/075 ,  H03H7/12 ,  H03H7/1775

摘要： A monolithic transformer compensated circuit with enhanced quality factor without significantly increasing noise levels is presented in this disclosure. The technique uses a monolithic transformer and a current source driving current into the transformer secondary winding to achieve loss compensation in the transformer primary. An ac current which is proportional to, and in phase with the voltage applied to the primary winding can be used to achieve theoretically perfect loss compensation at a given frequency in the RF (GHz) frequency range. Examples of circuit applications that are particularly suited to the technique include Voltage Controlled Oscillators (VCO's), Low Noise Amplifiers (LNA's) and Filters. The technique has the added advantage of reducing power consumption in some applications.

摘要翻译： 本公开中提出了具有增强的品质因数而不显着增加噪声水平的单片式变压器补偿电路。 该技术使用单片变压器和电流源驱动电流进入变压器次级绕组，以实现变压器初级中的损耗补偿。 可以使用与施加到初级绕组的电压成比例并与其同相的交流电，以在RF（GHz）频率范围内的给定频率实现理论上完美的损耗补偿。 特别适用于该技术的电路应用的示例包括压控振荡器（VCO），低噪声放大器（LNA）和滤波器。 该技术具有在一些应用中降低功耗的附加优点。

公开(公告)号：US20030087765A1

公开(公告)日：2003-05-08

申请号：US10167938

申请日：2002-06-10

申请人： SUPERCONDUCTOR TECHNOLOGIES, INC.

发明人： Balam Quitze Andres Willemsen Cortes ,  Albert H. Cardona ,  Neal O. Fenzi ,  Roger J. Forse

IPC分类号： H01P001/203 ,  H01B012/02

CPC分类号： H01P7/082 ,  C07C19/03 ,  H01F6/06 ,  H01F17/0006 ,  H01F2027/2861 ,  H01P7/00 ,  H03H1/00 ,  H03H2/00 ,  H03H7/0115 ,  H03H7/0123 ,  H03H7/03 ,  H03H2001/0071 ,  H03H2001/0078 ,  Y10S336/01 ,  Y10S505/70 ,  Y10S505/701 ,  Y10S505/866

摘要： Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative to known structures achieve numerous desirable benefits, especially including the reduced intermodulation effects of earlier resonators. In one aspect of this invention, a spiral in, spiral out resonator is provided, characterized in that it has an odd number of long runs, at least equal to five long runs, where the long runs are connected by turns, and wherein there are at least two sequential turns of the same handedness, followed by at least two turns of the opposite handedness. In yet another aspect of this invention, it has been discovered that reducing the size of the input and output pads of HTS resonators increases the relative inductance compared to the capacitance. Yet another resonator structure is a spiral snake resonator having a terminal end disposed within the resonator. A wide in the middle structure and wide at peak current density resonator structures utilize enlarged width portions of the resonator in those areas where current density is largest. In yet another aspect of this invention, operation of resonators in high modes, above the fumdamental mode, reduce peak current densities. Resonators operated in modes in which current in adjacent long runs are in the same direction further serve to reduce current densities, and intermodulation effects. Symmetric current structures and modes of operation are particularly advantageous where far field effects are compensated for.

摘要翻译： 提供了用于形成有用的高温超导装置，特别是谐振器的新颖结构和方法。 导致相对于已知结构降低的峰值电流密度的结构实现了许多期望的益处，特别是包括较早谐振器的减少的互调效应。 在本发明的一个方面，提供一种螺旋形螺旋输出谐振器，其特征在于，其具有奇数个长行程，至少等于五个长行程，其中长行程轮流连接，并且其中存在 至少两个相同的手性的连续转弯，其次是至少两圈相反的手感。 在本发明的另一方面，已经发现，与电容相比，减小HTS谐振器的输入和输出焊盘的尺寸增加了相对电感。 另一种谐振器结构是具有设置在谐振器内的终端的螺旋形蛇形谐振器。 中间结构宽，峰值电流密度谐振器结构宽，在电流密度最大的区域中利用谐振器的扩大宽度部分。 在本发明的另一方面，高于烟熏模式的高模式的谐振器的操作降低了峰值电流密度。 在相邻长行中的电流处于相同方向的模式下操作的谐振器进一步用于降低电流密度和互调效应。 对称电流结构和操作模式在远场效应得到补偿时特别有利。

公开(公告)号：US20020163406A1

公开(公告)日：2002-11-07

申请号：US10099319

申请日：2002-03-15

发明人： Kazuo Kawai

IPC分类号： H03H011/00

CPC分类号： H03J3/20 ,  H03H7/03 ,  H03H7/12 ,  H03H2210/012 ,  H03H2210/015 ,  H03H2210/04

摘要： A tuning circuit is so constructed that it is possible to set Q of the tuning circuit to a high desired value by using a negative resistance value. The tuning circuit is made to oscillate weakly by using a negative resistance circuit, a voltage-resistance converter and a digital-analog converter and a negative resistance of said negative resistance circuit is scanned by a counter, so that two negative resistance values corresponding to an oscillation amplitude and another oscillation amplitude of half of it are obtained by analog comparators COMP1 and COMP2. A negative resistance value to be set is operated by an adder/subtracter from a series resistance value corresponding to a desired Q and these value. Said scanning is stopped when said negative resistance value is obtained. The tuning circuit can be constituted small and simple by small size digital ICs.

摘要翻译： 调谐电路的构造使得可以通过使用负电阻值将调谐电路的Q设置为高期望值。 通过使用负电阻电路，电压电阻转换器和数模转换器使调谐电路弱振荡，并且所述负电阻电路的负电阻由计数器扫描，使得对应于两个负电阻值的两个负电阻值 其模拟比较器COMP1和COMP2可获得振荡幅度和振荡幅度的一半。 要由设定的负电阻值由加法器/减法器根据对应于期望Q的串联电阻值和这些值来操作。 当获得所述负电阻值时，所述扫描停止。 调谐电路可以由小型数字IC构成小而简单。