A Class D amplifier comprises a pulse width modulator and an output stage. D类放大器包括脉宽调制器和输出级。
At present some reports on hybrid vector modulators have been published, while the research of monolithic integrated balance vector modulator is still at the starting stage. 从本世纪初开始国内开始了该领域的研究工作,并公开报道了一些混合式矢量调制器的文献报道,单片集成平衡矢量调制器的研制正在起步阶段。