公开(公告)号：US5901054A

公开(公告)日：1999-05-04

申请号：US993297

申请日：1997-12-18

Applicant: Ching-Shan Leu ,  Jeang Hwang ,  Wueichan Liu

Inventor： Ching-Shan Leu ,  Jeang Hwang ,  Wueichan Liu

IPC: H02M3/28 ,  H02M1/12 ,  H02M3/24 ,  H02M3/335

CPC classification number: H02M3/285

Abstract: A PWM controlling circuit includes a signal generator and two PWM controllers. The signal generator comprises an oscillator, a plurality of inverters, and two RC delay networks. The oscillator and the inverters are composed of elementary elements, respectively, such as diodes, resistors, inverters and capacitors. The PWM controlling circuit in accordance with the present invention can be implemented with low cost, and the duty cycles thereof are not limited to 50%.

Abstract translation: PWM控制电路包括信号发生器和两个PWM控制器。 信号发生器包括振荡器，多个反相器和两个RC延迟网络。 振荡器和反相器分别由基本元件组成，如二极管，电阻，反相器和电容器。 根据本发明的PWM控制电路可以以低成本实现，其占空比不限于50％。