... 零值中心安培计 zero center ammeter 跨零频率，零交越频率 zero crossing frequency 零位线 zero line ...
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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。
LFMCW radar nonlinear residual frequency errors zero crossing detection periodogram.
标签LFMCW雷达非线性剩余频差过零检测周期图。
Quality square wave power supply, current zero crossing time is short, arc stability, arc without high frequency stability.
优质方波电源，电流过零时间短，电弧稳定，无需高频稳弧。
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