anti-aliasing filter 抗混叠滤波器：一种低通滤波器，用以在输出电平中把混叠频率分量降低到非常小的程度；reconstruction filter 重建滤波器：从采样恢复原信号的滤波器，作用就是根据采样点重建采样前的信号。举例一：The hardware of the system includes the FPGA chip, the voltage conditioning circuit, anti-aliasing filter circuit, PLL circuit, the A/ D sampling circuit.系统硬件部分包括FPGA处理芯片，电压调理电路，抗混叠滤波电路，锁相倍频电路，A/D采样电路。举例二：The application of bandpass sampling in data acquisition can reduce the sampling frequency greatly. But the anti-aliasing filter in the system would bring the phase nonlinearity.在数据采集中采用带通采样，可大大降低采样率，但系统中的抗混叠滤波器会造成相位的非线性。举例三：This thesis emphasizes on the design of the digital filter, sigma-delta modulator, IDAC and analog reconstruction filter.重点研究了数字滤波器、∑-△调制器、电流舵型数模转换器和模拟重建滤波器。举例四：Study on radioactive concentration and reconstruction filter function using SPECTSPECT重建滤波函数取值与放射性浓度的关系
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