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    • 1. 发明申请
    • Filter for a modulator and methods thereof
    • 调制器滤波器及其方法
    • US20050129142A1
    • 2005-06-16
    • US10734117
    • 2003-12-15
    • Daniel YellinKobby Pick
    • Daniel YellinKobby Pick
    • H03C3/09H03F3/24H04L27/36H03C3/00
    • H03F3/24H03C3/0925H03C3/0933H03F2200/331H04L27/361
    • In some exemplary embodiments of the invention, a transfer function of a filter for a fractional-N sigma-delta modulator may be calculated to be optimized according to predefined optimization criteria. For example, the optimization criteria may include spectral cleanliness at the output of the modulator, or the mean squared error of the input to the filter and the input to a voltage controlled oscillator of the fractional-N phase locked loop (PLL). In some exemplary embodiments, the filter may be adjusted to compensate for variations and/or impairments in the analog fractional-N PLL. A non-exhaustive list of examples for the transfer function includes a finite impulse response and an infinite impulse response.
    • 在本发明的一些示例性实施例中,可以计算用于分数N个Σ-Δ调制器的滤波器的传递函数,以根据预定义的优化标准进行优化。 例如,优化标准可以包括在调制器的输出处的光谱清洁度,或者到滤波器的输入的平均误差以及分数N锁相环(PLL)的压控振荡器的输入。 在一些示例性实施例中,可以调整滤波器以补偿模拟分数N PLL中的变化和/或损伤。 传递函数示例的非穷举列表包括有限脉冲响应和无限脉冲响应。
    • 8. 发明授权
    • Filter for a modulator and methods thereof
    • 调制器滤波器及其方法
    • US07912145B2
    • 2011-03-22
    • US10734117
    • 2003-12-15
    • Daniel YellinKobby Pick
    • Daniel YellinKobby Pick
    • H04L27/00
    • H03F3/24H03C3/0925H03C3/0933H03F2200/331H04L27/361
    • In some exemplary embodiments of the invention, a transfer function of a filter for a fractional-N sigma-delta modulator may be calculated to be optimized according to predefined optimization criteria. For example, the optimization criteria may include spectral cleanliness at the output of the modulator, or the mean squared error of the input to the filter and the input to a voltage controlled oscillator of the fractional-N phase locked loop (PLL). In some exemplary embodiments, the filter may be adjusted to compensate for variations and/or impairments in the analog fractional-N PLL. A non-exhaustive list of examples for the transfer function includes a finite impulse response and an infinite impulse response.
    • 在本发明的一些示例性实施例中,可以计算用于分数N个Σ-Δ调制器的滤波器的传递函数,以根据预定义的优化标准进行优化。 例如,优化标准可以包括在调制器的输出处的光谱清洁度,或者到滤波器的输入的平均误差以及分数N锁相环(PLL)的压控振荡器的输入。 在一些示例性实施例中,可以调整滤波器以补偿模拟分数N PLL中的变化和/或损伤。 传递函数示例的非穷举列表包括有限脉冲响应和无限脉冲响应。