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    • 18. 发明申请
    • SWITCHING MODE POWER SUPPLY SPECTRUM SHAPING AND THE METHOD THEREOF
    • 切换模式电源光谱形成及其方法
    • US20110110123A1
    • 2011-05-12
    • US12944568
    • 2010-11-11
    • En LiJunming ZhangYuancheng Ren
    • En LiJunming ZhangYuancheng Ren
    • H02M3/335
    • H02M3/33507H02M1/44H02M3/33523
    • Embodiments of circuits and methods for a switching mode power supply are described in detail herein. In one embodiment, a switching mode power supply includes a transformer having a primary winding and a secondary winding to supply power to a load, a feedback circuit that generates a feedback signal that varies in relation to the load on the secondary winding, a switching circuit coupled to the primary winding to control current flow through the primary winding, and a control circuit coupled to the switching circuit to control the on/off status of switching circuit in response to the feedback signal and the current flow through the primary winding. The control circuit comprises a spectrum shaping circuit configured to generate a spectrum shaping signal in response to the feedback signal. The spectrum shaping signal can then be used to regulate the switching frequency and the spectrum shaping range.
    • 本文详细描述了开关模式电源的电路和方法的实施例。 在一个实施例中,开关模式电源包括具有初级绕组和次级绕组以向负载供电的变压器,产生相对于次级绕组上的负载变化的反馈信号的反馈电路,开关电路 耦合到初级绕组以控制通过初级绕组的电流;以及控制电路,其耦合到开关电路,以响应于反馈信号和通过初级绕组的电流来控制开关电路的接通/断开状态。 该控制电路包括频谱整形电路,该频谱整形电路被配置为响应于反馈信号产生频谱整形信号。 频谱整形信号可用于调节开关频率和频谱整形范围。