Filter Circuits滤波器电路
A variety of filter circuits can be made from combinations of capacitors, inductors, and resistors. Click on the filter type for further details. 由电容器、电感器和电阻器的组合可以构成多种滤波器。点击滤波器类型以获取更多详情。
 Audio applications of filters include crossover networks for loudspeaker design. 滤波器在音频应用中的用途包括扬声器设计中的分频网络。 |
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Time Constant for Transients瞬态的时间常数
The electrical transient phenomena in capacitors and inductors are exponential processes. The coefficient of time in the exponential is an important rate parameter and is typically expressed in terms of a time constant. 电容器和电感器中的电气瞬态现象是指数过程。指数中的时间系数是一个重要的速率参数，通常以时间常数来表示。
 Having the units of time, the time constant represents the time for the exponential term to drop to 1/e or 36.79% of its original value. Each subsequent time constant will decrease it by the same fraction. The time constant is a standard parameter used to describe the characteristics of filter circuits. A standard application of low pass filters is to eliminate high frequency noise on signals like electrocardiograms. If the time constant is too short, there will not be enough filtering, but if it is too long, you will start to distort the shape of the ECG you are trying to preserve. 具有时间单位，时间常数表示指数项衰减到其原始值的1/e或36.79%所需的时间。每个后续的时间常数都会使其减少相同的比例。时间常数是一个标准参数，用于描述滤波器电路的特性。低通滤波器的典型应用是消除如心电图信号中的高频噪声。如果时间常数太短，滤波效果不足；但如果太长，则会开始扭曲你试图保留的ECG形状。
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