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    • 6. 发明申请
    • A METHOD TO REDUCE THE POWER CONSUMATION OF A DIGITAL FILTER BANK BY REDUCING THE NUMBER OF MULTIPLICATIONS
    • 减少数字滤波器数量的方法来减少数字滤波器的功耗
    • WO1992011696A1
    • 1992-07-09
    • PCT/SE1991000860
    • 1991-12-13
    • LUNNER, ThomasHELLGREN, Johan
    • H03H17/02
    • H03H17/0266H03H17/0223
    • A digital filter bank for reducing power consumption by decreasing the number of multiplications carried out therein. There is particularly proposed a filter bank for use in battery-operated applications. The digital filter bank includes a zero-filled digital basic filter [H1 (z)] having a complementary output, and downstream, parallel part-filter banks [HD1, HD2]. In the present context, a zero-filled filter pertains to a filter which may be based on an LP-filter which is expanded with a number of zero-value filter coefficients between each coefficient in the original filter. The part-filter bank [HD1] connected to the normal output of the basic filter [H1 (z)] is intended to filter-out those filter-bank bands which are pass bands to the basic filter, so that only one of the filter-bank bands is found on each output signal from said one part-filter bank [HD1]. The other part-filter bank [HD2] connected to the complementary output of the basic filter [H1 (z)] is intended to filter-out those filter-bank bands which are pass bands to the complementary output of the basic filter, so that only one filter-bank band is found on each output signal from the second part-filter bank [HD2].
    • 数字滤波器组,用于通过减少其中进行的乘法次数来降低功耗。 特别提出一种用于电池供电应用的滤波器组。 数字滤波器组包括具有互补输出的零填充数字基本滤波器[H1(z)]和下游并行部分滤波器组[HD1,HD2]。 在本上下文中,零填充滤波器涉及可以基于LP滤波器的滤波器,该滤波器在原始滤波器中的每个系数之间以多个零值滤波器系数扩展。 连接到基本滤波器[H1(z)]的正常输出的部分滤波器组[HD1]旨在将那些通过频带的滤波器组频带滤除到基本滤波器,使得仅一个滤波器 在来自所述一个部分滤波器组[HD1]的每个输出信号上找到了 - 银行频带。 连接到基本滤波器[H1(z)]的互补输出的另一部分滤波器组[HD2]旨在将那些通过频带的滤波器组频带滤除到基本滤波器的互补输出,使得 在来自第二部分滤波器组[HD2]的每个输出信号上仅找到一个滤波器组频带。
    • 8. 发明申请
    • PROCESSOR ARCHITECTURE FOR PROGRAMMABLE DIGITAL FILTERS IN A MULTI-STANDARD INTEGRATED CIRCUIT
    • 多标准集成电路中可编程数字滤波器的处理器架构
    • WO2008034027A3
    • 2008-09-12
    • PCT/US2007078439
    • 2007-09-14
    • TEXAS INSTRUMENTS INCSADAFALE MANGESH DEVIDASKRATOCHWIL KONRADKHASNIS HIMAMSHU GOPALAKRISHNA
    • SADAFALE MANGESH DEVIDASKRATOCHWIL KONRADKHASNIS HIMAMSHU GOPALAKRISHNA
    • G06F17/17
    • H03H17/0294H03H17/0223H03H17/0416H03H2218/10
    • An architecture for cascaded digital filters (104-1, 106-1 to 104-6, 106-6) comprises independently programmable controlling registers and independent interpolating factors (Il to 16); a digital to analog converter (108) for converting the digital signals into analog signals with a constant sampling rate which matches with the interpolating factors of the cascaded digital filters. Each filter (106-1 to 106-6) property (filters order, coefficient symmetry, half- band, and poly-phase) can be programmed independently to support different system requirements and extract maximum throuput from a given hardware. The method of filtering digital signals comprises the steps of determining an interpolation factor of the cascaded digital filters with the lowest number of computations so as to match with the single sampling rate of the digital to analog converter, determining active filters and an interpolation factor of each digital filter in the cascaded digital filters, and determining a mode of operation of the cascaded digital filters.
    • 用于级联数字滤波器(104-1,106-1至104-6,106-6)的架构包括独立可编程控制寄存器和独立内插因子(Il至16); 数模转换器(108),用于将数字信号转换成具有与级联数字滤波器的内插因子相匹配的恒定采样率的模拟信号。 每个滤波器(106-1至106-6)的属性(滤波器顺序,系数对称,半频带和多相)可以独立编程,以支持不同的系统要求,并从给定的硬件中提取最大的输出。 滤波数字信号的方法包括以下步骤:确定具有最低计算次数的级联数字滤波器的内插因子,以便与数模转换器的单采样率相匹配,确定有源滤波器和每个 级联数字滤波器中的数字滤波器,以及确定级联数字滤波器的操作模式。