Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means.
脉冲宽度调制或PWM，是通过数字均值获得模拟结果的技术。
The pulse position modulation (PPM) technique is widely used in the field of ultra-wideband wireless digital communication.
时间脉冲位置调制(PPM)技术在超宽带无线数字通信领域得到了广泛应用。
The principle of converting analog signals to digital signals bacame popular with the introduction of pulse code modulation ;
随着脉冲编码调制技术的出现，把模拟信号转换为数字信号的原理得到广泛应用；
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