during signal processing, choosing low noise, high-precision, low-power amplifier ad620 as a pre-amplifier, and high-and low-pass filter and the frequency notch filter removal of interfering signals.
在信号处理中选用具有低噪声、高精度、低功耗放大器ad620作为前置放大器,并以高、低通滤波器和工频陷波器清除干扰信号。
the reflection of thin layer may lead to frequency notch and the reciprocal of notch cycle is equal to the time thickness of thin layer.
薄层反射在频率域会出现陷频现象,其陷频周期的倒数等于薄层的时间厚度。
by adding a second frequency notch filter, the constant switching frequency direct power control(csf-dpc) can be used for the unbalanced fault ride through operation.
通过引入二倍电网频率陷波器,使定开关频率直接功率控制(csf-dpc)可适用于不对称性故障穿越运行控制。