利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

36 条记录 (耗时 0.013 秒)

    Limit-cycle oscillation suppression method, system, and computer program product
    14.
    发明公开
    Limit-cycle oscillation suppression method, system, and computer program product 有权
    Verfahren，System und Computerprogramm zurUnterdrükungder Grenzzyklen

    公开(公告)号：EP1394942A2

    公开(公告)日：2004-03-03

    申请号：EP03019400.5

    申请日：2003-08-27

    申请人： Broadcom Corporation

    发明人： Wang, Minsheng

    IPC分类号： H03H17/04

    CPC分类号： H03H17/0461 ,  H03H2017/0466

    摘要： Limit-cycle oscillations are caused by the compounding of quantization errors that occurs when previous digital filter outputs are used as inputs to the digital filter for the current operation. Where a signal in a digital waveform has become a constant common value applied to the input of the digital filter (indicative that the digital waveform has suspended conveyance of data), limit-cycle oscillations often appear as "random" outputs, with values different from the common value, that occur long after the signal in the digital waveform has become the constant common value. Limit-cycle oscillations are manifested as noise in the filtered digital waveform. Such noise hampers the ability of the system to extract the signal from the filtered digital waveform. The present invention identifies the occurrence of a limit-cycle oscillation as an output different from the common value. The identified limit-cycle oscillation is set equal to the common value.

    摘要翻译： 极限周期振荡是由以前的数字滤波器输出作为当前操作的数字滤波器的输入而发生的量化误差的复合引起的。 在数字波形中的信号已经成为应用于数字滤波器的输入的常数公共值（表示数字波形已经暂停数据传输）的情况下，极限循环振荡通常表现为“随机”输出，其值不同于 在数字波形中的信号已经成为常数的公共值之后的共同值。 极限周期振荡表现为滤波数字波形中的噪声。 这种噪声妨碍了系统从滤波后的数字波形中提取信号的能力。 本发明将极限循环振荡的出现识别为与公共值不同的输出。 所识别的极限周期振荡被设置为等于公共值。

    Digital filter with efficient quantization circuitry
    15.
    发明公开
    Digital filter with efficient quantization circuitry 审中-公开
    具有高效量化电路数字滤波器

    公开(公告)号：EP0948133A2

    公开(公告)日：1999-10-06

    申请号：EP99200588.4

    申请日：1999-03-02

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： Gandhi, Prashant ,  Hochschild, James R.

    IPC分类号： H03H17/04

    CPC分类号： H03H17/0461 ,  H03H17/04

    摘要： An infinite impulse response (IIR) digital filter and method of performing the same is disclosed. The digital filter may be realized by way of a programmable logic device, such as a digital signal processor (75), or alternatively by way of dedicated logic including adders (44, 48, 50, 54, 58, 62, 66, 70, 72) and shifters (46, 52, 56, .60, 64). In either case, addition operations (34) are interleaved among first and second output sample values (y n-1 , y n-2 ), so that the resulting addition (30; 72; 215; 320) may be carried out with adder circuitry of the same precision as the signal input (x n ) and signal output (y n ). Carry control circuitry (76, 78, 80, 82, 84, 88; 217; 317) is provided to efficiently incorporate magnitude truncation quantization.

    Recursive digital filter
    17.
    发明公开
    Recursive digital filter 失效
    Digitaler Rekursiv过滤器

    公开(公告)号：EP0082565A2

    公开(公告)日：1983-06-29

    申请号：EP82201596.2

    申请日：1982-12-14

    申请人： Philips Electronics N.V.

    发明人： Butterweck, Hans-Jürgen ,  Van Meer, Adrianus C. P. ,  Verkroost, Gérard

    IPC分类号： H03H17/04

    CPC分类号： H03H17/0461

    摘要： Recursive digital fitter comprising a first circuit 1 including a cascade arrangement of a magnitude truncation quantizing arrangement and an adder 6, 8. Said first circuit has an output 5, and also inputs 3 and 4, this output 5 being connected to the input 3 via a second circuit 10 and to the input 4 via a third circuit 11. Both last-mentioned circuits are formed by a cascade arrangement of an auxiliary circuit 12 and 14, respectively and a multiplier arrangement 13 and 15, respectively. The auxiliary circuit 12 has a transfer function H 1 (z) = p/ (z-1) and the auxiliary circuit 14 has a transfer function H 2 (z) = q/ (z+1), wherein p and q represent constants.

    摘要翻译： 递归数字滤波器包括包括幅度截断量化装置的级联布置的第一电路1和加法器6,8。所述第一电路具有输出5，以及输入端3和4，该输出端5通过 第二电路10和经由第三电路11的输入4.两个最后提到的电路分别由辅助电路12和14的级联布置和乘法器装置13和15分别形成。 辅助电路12具有传递函数H1（z）= p /（z-1），辅助电路14具有传递函数H2（z）= q /（z + 1），其中p和q表示常数。

    AUTOMATIC INPUT ERROR RECOVERY CIRCUIT AND METHOD FOR RECURSIVE DIGITAL FILTERS
    20.
    发明公开
    AUTOMATIC INPUT ERROR RECOVERY CIRCUIT AND METHOD FOR RECURSIVE DIGITAL FILTERS 有权
    自动输入纠错电路和方法数字递归滤波器

    公开(公告)号：EP1904935A2

    公开(公告)日：2008-04-02

    申请号：EP06786485.0

    申请日：2006-07-07

    申请人： Texas Instruments Incorporated

    发明人： KUYEL, Turker

    IPC分类号： G06F17/10

    CPC分类号： H03H17/0461

    摘要： Recursive digital filter (3) circuitry which avoids persistent unstable conditions therein provides a serial clock signal, a synchronization signal, and a serial data input to corresponding inputs of a three- wire serial interface circuit (2) to produce a serial clock output signal, a synchronization output signal, and a parallel data output signal which are applied to corresponding inputs of a recursive digital filter. The serial clock signal and the synchronization signal are input to an auto-reset circuit (6) which detects a fault associated with the synchronization signal or the serial clock signal and produces a reset signal in res onse to detection of the fault for resettin the recursive digital filter.