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发明公开
CN106664077A 数字滤波器 有权

数字滤波器
摘要：
本发明的数字滤波器包括：累积计算部(10)，其按与输入数据的采样频率相同的采样频率fS的时钟进行动作，对每1样本累积输入数据；频率变换部(12)，其以采样频率fD＝fS/N间隔剔出采样频率fS的数据；差分计算部(11)，其按采样频率fD的时钟进行动作，从输入数据中减去1个样本前的数据；50Hz去除用差分计算部(20)，其按采样频率fD的时钟进行动作，从输入数据中减去多个样本前的数据；以及60Hz去除用差分计算部(30)，其按采样频率fD的时钟进行动作，从输入数据中减去多个样本前的数据。
摘要（英）：

A digital filter is provided with: a summation calculation unit (10) which operates by a clock having the same sampling frequency (fS) as the sampling frequency of input data, and adds up the input data on a sample-by-sample basis; a frequency conversion unit (12) which thins out data of the sampling frequency (fS) at a sampling frequency (fD=fS/N); a difference calculation unit (11) which operates by a clock having the sampling frequency (fD), and subtracts data of one sample before from the input data; a difference calculation unit for removing 50 Hz (20) which operates by the clock having the sampling frequency (fD), and subtracts data of two or more samples before from the input data; and a difference calculation unit for removing 60 Hz (30) which operates by the clock having the sampling frequency (fD), and subtracts data of two or more samples before from the input data.

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