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    • 3. 发明申请
    • A MULTIPLIERLESS INTERPOLATOR FOR A DELTA-SIGMA DIGITAL TO ANALOG CONVERTER
    • 用于三角形数字转换器的多功能插补器
    • WO01056167A2
    • 2001-08-02
    • PCT/US2001/002744
    • 2001-01-26
    • H03H17/02H03H17/04H03H17/06H03M3/00
    • H03H17/0225H03H17/0279H03H17/0285H03H17/0416H03H17/0444
    • A simplified algorithm for digital signal interpolation and a novel architecture to implement the algorithm in an integrated circuit ("IC") with significant space constraints are presented. According to the embodiments of the present invention, the interpolator is divided into two parts. The first part of the interpolator increases the sample rate by a factor of two and smoothes the signal using a half-band Infinite Impulse Response ("IIR") filter. The second part of the interpolator increases the sample rate of the signal by a factor of thirty-two using a zero-order-hold ("ZOH") circuit. In one embodiment, the half-band IIR filter is implemented using an all-pass lattice structure to minimize quantization effects. The lattice coefficients are chosen such that the structure can achieve all filter design requirements, yet is capable of being implemented with a small number of shifters and adders, and no multipliers.
    • 提出了一种用于数字信号插值的简化算法和一种在具有显着空间约束的集成电路(“IC”)中实现该算法的新型架构。 根据本发明的实施例,内插器被分成两部分。 插值器的第一部分将采样率提高一倍,并使用半带无限脉冲响应(“IIR”)滤波器对信号进行平滑。 内插器的第二部分使用零级保持(“ZOH”)电路将信号的采样率增加了三十二倍。 在一个实施例中,使用全通格格结构来实现半带IIR滤波器以使量化效应最小化。 选择晶格系数使得该结构可以实现所有滤波器设计要求,但是能够用少量的移位器和加法器实现,并且不需要乘法器。
    • 5. 发明申请
    • A MULTIPLIERLESS INTERPOLATOR FOR A DELTA-SIGMA DIGITAL TO ANALOG CONVERTER
    • 用于三角形数字转换器的多功能插补器
    • WO0156167A3
    • 2002-03-14
    • PCT/US0102744
    • 2001-01-26
    • SONIC INNOVATIONS INC
    • WILSON GERALDGREEN ROBERT S
    • H03H17/02H03H17/04H03H17/06
    • H03H17/0225H03H17/0279H03H17/0285H03H17/0416H03H17/0444
    • A simplified algorithm for digital signal interpolation and a novel architecture to implement the algorithm in an integrated circuit ("IC") with significant space constraints are presented. According to the embodiments of the present invention, the interpolator is divided into two parts. The first part of the interpolator increases the sample rate by a factor of two and smoothes the signal using a half-band Infinite Impulse Response ("IIR") filter. The second part of the interpolator increases the sample rate of the signal by a factor of thirty-two using a zero-order-hold ("ZOH") circuit. In one embodiment, the half-band IIR filter is implemented using an all-pass lattice structure to minimize quantization effects. The lattice coefficients are chosen such that the structure can achieve all filter design requirements, yet is capable of being implemented with a small number of shifters and adders, and no multipliers.
    • 提出了一种用于数字信号插值的简化算法和一种在具有显着空间约束的集成电路(“IC”)中实现该算法的新型架构。 根据本发明的实施例,内插器被分成两部分。 插值器的第一部分将采样率提高一倍,并使用半带无限脉冲响应(“IIR”)滤波器对信号进行平滑。 内插器的第二部分使用零级保持(“ZOH”)电路将信号的采样率增加了三十二倍。 在一个实施例中,使用全通格格结构来实现半带IIR滤波器以使量化效应最小化。 选择晶格系数使得该结构可以实现所有滤波器设计要求,但是能够用少量的移位器和加法器实现,并且不需要乘法器。