脉冲宽度调制是一种模拟控制方脉冲宽度调制是利用微处理器的数字输出来对模拟电路进行控制的一种非常有效的技术，广泛应用在从测量、通信到功率控制与变换的许多领域中脉冲宽度调制是利用微处理器的数字输出来对模拟电路进行控制的一种非常有效的技术，广泛应用在从测量、通信到功率控制与变换的许多领域中。

- Pulse width modulation is a kind of analog control pulse width modulation is to use digital microprocessor output to control a very effective technique for analog circuits, widely used in　many fields of measurement, communication and power control and conversion pulse width modulation is the microprocessor of the digital output to control a very effective technique for analog circuits, is widely used in many fields of measurement, communication and power control and conversion.