Analog synthesis often use low-pass filter to remove electronic audio generator generated by high-frequency noise.
模拟合成器常常使用低通滤波器来去除电子音频发生器所产生的高频噪声。
2
The paper introduced the hazard of large turbine generator operation under abnormal frequency and technical requirements and criteria for low frequency protection.
介绍了大型汽轮发电机组频率异常运行的危害和对低频保护的技术要求及准则；
3
In addition a digital signal generator was incorporated via a DDS chip AD9850 from Analog Devices inc, featuring accurate frequency preset, quick phase transformation and low phase noise.