基本信息:
- 专利标题： Digital filter apparatus
- 专利标题（中）：数码过滤器
- 申请号：JP2006281503 申请日：2006-10-16
- 公开(公告)号：JP2008099182A 公开(公告)日：2008-04-24
- 发明人： SUZUKI YASUYUKI , NAKAMURA SHINICHI , SATO HIROSHI
- 申请人： Toshiba Corp , Toshiba Microelectronics Corp , 東芝マイクロエレクトロニクス株式会社 , 株式会社東芝
- 专利权人： Toshiba Corp,Toshiba Microelectronics Corp,東芝マイクロエレクトロニクス株式会社,株式会社東芝
- 当前专利权人： Toshiba Corp,Toshiba Microelectronics Corp,東芝マイクロエレクトロニクス株式会社,株式会社東芝
- 优先权： JP2006281503 2006-10-16
- 主分类号： H03H17/04
- IPC分类号： H03H17/04 ; H03H17/02 ; H03H17/06
摘要：
PROBLEM TO BE SOLVED: To provide a digital filter apparatus capable of suppressing the noise that can be generated, when filter characteristics are to be changed.
SOLUTION: In the digital filter apparatus 100, a peak value control circuit 8 compares a first gain multiplication value g0 with a second gain multiplication value, substitutes the filter coefficient for a new filter coefficient from a second coefficient register 7 and it is made to be stored in a first coefficient register 2 with the timing where timing the gain multiplication value becomes zero, or becomes closest to zero for the first time, and substitutes the filter coefficient for a new filter from the second coefficient register 7 and it is made to be stored in the first coefficient register 2 with the timing where the timing the closer of the first gain multiplication value and the second gain multiplication is applied to a gain multiplier 4, when the code of the first gain multiplication value is the same as that of the code of the second gain multiplication value. A IIR-type digital filter 3 uses the filter coefficient, stored in the first coefficient register 2, for filtering.
COPYRIGHT: (C)2008,JPO&INPIT
摘要（中）：
SOLUTION: In the digital filter apparatus 100, a peak value control circuit 8 compares a first gain multiplication value g0 with a second gain multiplication value, substitutes the filter coefficient for a new filter coefficient from a second coefficient register 7 and it is made to be stored in a first coefficient register 2 with the timing where timing the gain multiplication value becomes zero, or becomes closest to zero for the first time, and substitutes the filter coefficient for a new filter from the second coefficient register 7 and it is made to be stored in the first coefficient register 2 with the timing where the timing the closer of the first gain multiplication value and the second gain multiplication is applied to a gain multiplier 4, when the code of the first gain multiplication value is the same as that of the code of the second gain multiplication value. A IIR-type digital filter 3 uses the filter coefficient, stored in the first coefficient register 2, for filtering.
COPYRIGHT: (C)2008,JPO&INPIT
要解决的问题：提供一种能够抑制可能产生的噪声的数字滤波器装置，当要改变滤波器特性时。 解决方案：在数字滤波器装置100中，峰值控制电路8将第一增益乘法值g0与第二增益乘法值进行比较，将来自第二系数寄存器7的滤波器系数代入新的滤波器系数， 使其被存储在第一系数寄存器2中，其中增益倍数值的定时变为零的定时，或者第一次变为最接近零的定时，并且将滤波器系数替换为来自第二系数寄存器7的新滤波器，并且它是 使得当第一增益乘法值和第二增益乘法越接近的定时被施加到增益乘法器4的定时被存储在第一系数寄存器2中，当第一增益乘法值的代码与 第二增益乘法值的代码。 IIR型数字滤波器3使用存储在第一系数寄存器2中的滤波器系数进行滤波。 版权所有（C）2008，JPO＆INPIT
公开/授权文献:
- JP4901416B2 Digital filter device 公开/授权日：2012-03-21