基于T型滤波器的调光方法，能在很窄的工作频率范围内实现深度调光，同时具有灯电流波峰因数低的优点。
Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
但它能够更好的滤波和更低的耗散因数。
But it has better ripple current and dissipation factor characteristic.
每个梯形输入的加权因数与一个数字滤波器抽头系数对应。
Each ladder input's weighting factor corresponds to one of the digital filter tap coefficients.
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