脉宽调制器是一种能够产生周期固定而占空比(脉宽)可调的方波信号的电路。
Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
在周期性方波激励下，电路中产生衰减振荡波形。
If the pumping signal is the periodic square wave, the damped oscillation wave will be generated in the circuit.
方波信号是数字电路中非常重要的信号源，其产生方法有很多途径。
The squarewave signal is an extremely important source in the digital circuit, which could be produced in many ways.
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