单项选择题 以下内容属于“清扫”的是（）

未知题型 Osborne works as the sports editor for his college yearbook, The Tailsman. He’s written sports for WKU’s The Sporting Times and worked at WBKO Television in Bowling Green, Ky. as a video editor. Osborne has also worked with a sports marketing team.

单项选择题 调用什么方法来停止产生PWM信号？