-
公开(公告)号：US07135940B2
公开(公告)日：2006-11-14
申请号：US11039872
申请日：2005-01-24
CPC分类号： H03J3/08 , H03H9/542 , H03H9/605 , H03H2210/012 , H03H2210/015 , H03J1/0008
摘要： A tunable filter has a plurality of variable capacitors and a plurality of inductor elements, each being formed on a common substrate, a filter circuit formed by using at least a portion of the plurality of variable capacitors and a portion of the plurality of inductor elements, a monitor circuit formed by using at least a portion of the plurality of variable capacitors and a portion of the plurality of inductor elements, a detecting circuit which detects a prescribed circuit constant of the monitor circuit, a storage which stores information relating to a reference circuit constant of the monitor circuit, and a capacitance control circuit which controls capacitance of the variable capacitors in the monitor circuit and capacitance of the variable capacitors in the filter circuit, based on a result detected by the detecting circuit and information stored in the storage.
摘要翻译： 可调谐滤波器具有多个可变电容器和多个电感器元件，每个电感器元件形成在公共基板上，通过使用多个可变电容器的至少一部分和多个电感器元件的一部分形成的滤波器电路， 通过使用多个可变电容器的至少一部分和多个电感器元件的一部分形成的监视电路，检测监视电路的规定电路常数的检测电路，存储与参考电路有关的信息的存储器 基于由检测电路检测的结果和存储在存储器中的信息，控制监视电路中的可变电容器的电容和滤波器电路中的可变电容器的电容的电容控制电路。
-
公开(公告)号：US20050286623A1
公开(公告)日：2005-12-29
申请号：US10879948
申请日：2004-06-28
申请人： James Jaussi , Bryan Casper , Ganesh Balamurugan , Stephen Mooney
发明人： James Jaussi , Bryan Casper , Ganesh Balamurugan , Stephen Mooney
CPC分类号： H03H15/00 , H03H21/0001 , H03H2015/007 , H04L25/03038 , H04L2025/03726
摘要： In some embodiments, an adaptive filter employs two adaptation modes, where during one adaptation mode the adaptive filter is updated only when the received training sample is a first binary value and during the other adaptation mode the adaptive filter is updated only when the received sample is a second binary value. Each adaptation mode provides a set of filter weights, and these two sets of filter weights are averaged to provide an adapted set of filter weights. The use of two adaptation mode allows for a clock boundary in which the digital portion of the filter operates at a lower clock rate than the analog portion. In other embodiments, a filter architecture is described for providing the algebraic signs of the received data samples, important for sign-sign least means square filtering algorithms. In other embodiments, a filter architecture is described in which efficient use is made of voltage-to-current converters so as to achieve a high throughput rate during filtering. Embodiments of the present invention have application to channel equalization.
摘要翻译： 在一些实施例中，自适应滤波器采用两种适应模式，其中在一个自适应模式期间，只有当所接收的训练样本是第一二进制值时才自动滤波器被更新，并且在另一自适应模式期间，仅当所接收的样本是 第二个二进制值。 每个适配模式提供一组滤波器权重，并且将这两组滤波器权重进行平均以提供一组适用的滤波器权重。 使用两个适配模式允许滤波器的数字部分以比模拟部分更低的时钟速率工作的时钟边界。 在其他实施例中，描述了用于提供接收数据样本的代数符号的滤波器架构，对于符号最小均方滤波算法而言是重要的。 在其他实施例中，描述了一种滤波器架构，其中有效地使用电压 - 电流转换器，以便在滤波期间实现高吞吐率。 本发明的实施例具有对信道均衡的应用。
-
公开(公告)号：US20050254566A1
公开(公告)日：2005-11-17
申请号：US11187266
申请日：2005-07-22
申请人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
-
公开(公告)号：US20050253541A1
公开(公告)日：2005-11-17
申请号：US11116757
申请日：2005-04-28
申请人： Holger Stork
发明人： Holger Stork
摘要： A method for measuring the rotational speed of an EC motor having a primary part including a winding, and a secondary part having magnet segments offset with respect to one another in the circumferential direction and magnetized in alternatingly opposite directions, the magnet segments having tolerances regarding their positioning and/or their dimensions, the method including rotating the secondary part with respect to the primary part and detecting the position of the magnet segments with respect to the primary part. The position measuring signal is differentiated to form a rotational speed signal. At least one correction value is determined and saved to compensate the influence of at least one of the tolerances on the speed signal. The speed signal is corrected with the aid of the correction value.
摘要翻译： 一种用于测量具有包括绕组的主要部分的EC电动机的旋转速度的方法，以及具有相对于彼此在圆周方向上彼此偏移并且沿相反方向磁化的磁体分段的次级部分，磁体部分具有关于它们的公差 定位和/或其尺寸，所述方法包括相对于主要部分旋转次级部件并且检测磁体部分相对于主要部件的位置。 位置测量信号被微分以形成转速信号。 确定并保存至少一个校正值以补偿至少一个公差对速度信号的影响。 借助于校正值校正速度信号。
-
公开(公告)号：US06961718B2
公开(公告)日：2005-11-01
申请号：US09993207
申请日：2001-11-16
申请人： Mark Thomson , Simon Boland , Michael Smithers , Zhenjie Wu
发明人： Mark Thomson , Simon Boland , Michael Smithers , Zhenjie Wu
CPC分类号： G10L19/038 , H03H21/003
摘要： An encoder and associated vector estimation method and system (1) for processing a sequence of input vectors (y0 to yT) each comprising a plurality of elements. The vector estimation system (1) has a digital filter (2) with a filter vector input (3) for receiving said sequence of input vectors (y0 to yT) and a predictor gain input (4) for controlling characteristics of the filter (2). The filter (2) is a Kalman filter and has both a current slowly evolving filter estimate output (6) and a previous slowly evolving filter estimate output (20). The current slowly evolving filter estimate output (6) provides a current filtered estimate value of a slowly evolving component of said sequence of input vectors (y0 to yT) and the previous slowly evolving filter estimate output (20) provides a previous filtered estimate value of the slowly evolving component of said sequence of input vectors (y0 to yT). There is also a parameter estimator (10) having an estimator vector input (19) for receiving said sequence of input vectors (y0 to yT) and a previous slowly evolving filter estimate input (13) coupled to the previous slowly evolving filter estimate output (20). The parameter estimator further includes a predictor gain output coupled (11) to the predictor gain input (4). In operation, when the vector estimation system (1) receives a current input vector that is one of the sequence of said input vectors (y0 to yT), the parameter estimator (10) provides a current predictor gain value at the predictor gain output (11) thereby modifying the current filtered estimate value. The current predictor gain value is dependent upon both the previous filtered estimate value and the current input vector.
-
公开(公告)号：US06961423B2
公开(公告)日：2005-11-01
申请号：US10178176
申请日：2002-06-24
申请人： Lucio F. C. Pessoa , Roman A. Dyba , Perry P. He
发明人： Lucio F. C. Pessoa , Roman A. Dyba , Perry P. He
CPC分类号： H04B3/23 , H03H21/0012 , H03H2021/0078
摘要： A communication system having an echo canceller is disclosed. One embodiment of the echo canceller includes an adaptive filter used to provide an estimate of reflected echo which is removed from the send signal. The echo canceller may also include a near-end talker signal detector which may be used to prevent the adaptive filter from adapting when a near-end talker signal is present. The echo canceller may also include a nonlinear processor used to further reduce any residual echo and to preserve background noise. The echo canceller may also include a monitor and control unit which may be used to monitor the filter coefficients and gain of the adaptive filter to maintain stability of the echo canceller, estimate pure delay, detect a tone, and inject a training signal. The echo canceller may also include a nonadaptive filter used to reduce the length of the adaptive filter.
摘要翻译： 公开了一种具有回波消除器的通信系统。 回波消除器的一个实施例包括用于提供从发送信号中去除的反射回波的估计的自适应滤波器。 回波消除器还可以包括近端讲话者信号检测器，其可以用于在存在近端讲话者信号时防止自适应滤波器适应。 回波消除器还可以包括非线性处理器，用于进一步减少任何残留回波并保留背景噪声。 回波消除器还可以包括监视器和控制单元，其可以用于监视滤波器系数和自适应滤波器的增益以保持回声消除器的稳定性，估计纯延迟，检测音调以及注入训练信号。 回波消除器还可以包括用于减小自适应滤波器的长度的非自适应滤波器。
-
公开(公告)号：US20050186917A1
公开(公告)日：2005-08-25
申请号：US11110349
申请日：2005-04-19
CPC分类号： H03F3/45183 , H03F3/245 , H03F3/45475 , H03H11/1291 , H03H21/0001 , H03H21/0012 , H03H2011/0494 , H03J2200/10 , H04B1/40 , H04B17/14
摘要： An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
摘要翻译： 在说明书和附图中描述和示出的本发明的示例性实施例是具有接收器，发射器，本地振荡器（LO）发生器，控制器和自检单元的收发器。 所有这些组件都可以封装以集成到单个IC中，其中包括过滤器和电感器等组件。 用于接收机，发射机和LO发生器的自适应编程和校准的控制器。 自检单元产生用于确定接收机，发射机和LO发生器的增益，频率特性，选择性，本底噪声和失真特性。 要强调的是，该摘要被提供以符合要求摘要的规则，这将允许搜索者或其他读者快速确定技术公开的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。
-
公开(公告)号：US20050152444A1
公开(公告)日：2005-07-14
申请号：US11029508
申请日：2005-01-06
申请人： Woo Kim
发明人： Woo Kim
CPC分类号： H03H17/0223 , H03H17/0294 , H03H21/0012
摘要： Disclosed is a digital filter with a combined architecture of a 4-tap real valued filter and a-tap complex valued filter, whereby the filter size is reduced and no output delay is occurred due to the filter operations. According to the present invention, the digital filter is operated either in real valued filter mode or complex valued filter mode according to a mode selection signal, a filter output is obtained within one clock according to an operation selection signal, and an operator performs operations twice within one symbol clock (i.e., a time period) unlike a related art filter in which an operator performs the operation only once for each symbol clock. Therefore, the present invention filter is capable of resolving the filter size problem by substantially reducing the number of multipliers and adders.
摘要翻译： 公开了一种具有4抽头实值滤波器和抽头复值滤波器的组合结构的数字滤波器，由此滤波器尺寸减小，并且由于滤波器操作而没有发生输出延迟。 根据本发明，根据模式选择信号，数字滤波器以实值滤波器模式或复值滤波器模式运行，根据操作选择信号在一个时钟内获得滤波器输出，并且操作者执行两次操作 在一个符号时钟（即，时间段）内，与现有技术滤波器不同，其中操作者对于每个符号时钟仅执行一次操作。 因此，本发明的滤波器能够通过大幅减少乘法器和加法器的数量来解决滤波器尺寸问题。
-
公开(公告)号：US20050143634A1
公开(公告)日：2005-06-30
申请号：US11070629
申请日：2005-03-01
申请人： Clark Baker , Thomas Yorkey
发明人： Clark Baker , Thomas Yorkey
CPC分类号： A61B5/7203 , A61B5/0075 , A61B5/024 , A61B5/02416 , A61B5/14551 , A61B5/14552 , A61B5/7207 , A61B5/7239 , A61B5/725 , G06F19/00 , H03H21/003
摘要： A method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter. The method and apparatus of the invention take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements. Varying weights are assigned different measurements, measurements are rejected, and the averaging period is adjusted according to the reliability of the measurements. Similarly, calculated values derived from analyzing the measurements are also assigned varying weights and averaged over adjustable periods. More specifically, a general class of filters such as, for example, Kalman filters, is employed in processing the measurements and calculated values. The filters use mathematical models which describe how the physiological parameters change in time, and how these parameters relate to measurement in a noisy environment. The filters adaptively modify a set of averaging weights to optimally estimate the physiological parameters.
摘要翻译： 一种用于减少噪声对用于测量生理参数的系统的影响的方法和装置，例如脉搏血氧计。 本发明的方法和装置考虑到当加权和平均一系列测量时监测的各种生理参数的物理限制。 不同的权重被分配不同的测量，测量被拒绝，平均期间根据测量的可靠性进行调整。 类似地，从分析测量得到的计算值也被赋予变化的权重并且在可调周期上平均。 更具体地，在处理测量值和计算值时，采用一般的滤波器类，例如卡尔曼滤波器。 过滤器使用描述生理参数如何随时间变化的数学模型，以及这些参数如何与嘈杂环境中的测量相关。 滤波器自适应地修改一组平均权重以最佳地估计生理参数。
-
公开(公告)号：US20050135468A1
公开(公告)日：2005-06-23
申请号：US10741039
申请日：2003-12-19
CPC分类号： H04L25/03038 , H03H21/0012 , H04L2025/03477 , H04L2025/03617 , H04L2025/03662 , H04L2025/03745
摘要： Disclosed are a multi-tap filter, and method of using same, to filter an analog input signal to provide an equalized analog signal. Each of a plurality of coefficients in the multi-tap filter may be updated based, at least in part, upon a comparison of the equalized analog signal with one or more symbol values at an instance determined by inter-symbol timing information.
摘要翻译： 公开了一种多抽头滤波器及其使用方法，用于对模拟输入信号进行滤波以提供均衡的模拟信号。 至少部分地，可以基于由符号间定时信息确定的实例将均衡的模拟信号与一个或多个符号值的比较来更新多抽头滤波器中的多个系数中的每一个。
-
-
-
-
-
-
-
-
-
搜索结果
1326 条记录 (耗时 0.04 秒)
