1·Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
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。
2·A simple and high - Performance brushless DC generator consisting of a controlled rectifying circuit and permanent magnet square wave motor is Presented.
提出了一种可控整流电路，它与永磁方波电机联合构成一种简单、高性能的无刷直流发电机。
3·The operation principle and designing method of PWM controller of brushless DC square wave motor is introduced.
本文介绍了无刷直流方波电机的工作原理和其PWM控制器的设计。
4·The square wave source is an impulse source in which digital technique is used. It has the advantages of rigid phase, high frequency stabilization and high antijamming.
方波电源是采用数字技术的脉冲电源，具有相位严格、频率稳定度高，抗干扰能力强等独特的优点。
5·The practice proves that this circuit is effective for separation of high-frequency square wave signals and peak pulse interference signals.
实践证明：该电路能有效地实现高频方波信号与尖峰脉冲干扰信号的信噪分离。