zero signal input的意思|示意

The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.

该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。

The output of the amplifier (electrical current) is controlled by the input signal so with zero input the output current is also zero.

放大器地输出(电流)由输入信号控制，所有零输入信号，电流输出也是零。