公开(公告)号：EP1653618A3

公开(公告)日：2008-05-28

申请号：EP05110094.9

申请日：2005-10-27

Applicant: STMicroelectronics Pvt. Ltd.

Inventor： Agarwal, Nitin

IPC: H03K7/08

CPC classification number: H03K7/08

Abstract: A PWM generator system providing improved duty cycle resolution comprising a sub-cycle generator for generating a sub-cycle with a period that is a small fraction of the maximum PWM period to be generated. An integral sub-cycle estimator is coupled to said sub-cycle generator for determining the integral number of said sub-cycles for on and off time of said PWM waveform, and an additional sub-cycle estimator for determining the additional fractional sub-cycle required to provide said on and off time. A timer is coupled to said integral sub cycle estimator and said additional sub cycle estimator for controlling PWM output switching for the on and off time of the integral and additional fractional sub cycles.

公开(公告)号：EP1653618A2

公开(公告)日：2006-05-03

申请号：EP05110094.9

申请日：2005-10-27

Applicant: STMicroelectronics Pvt. Ltd

Inventor： Agarwal, Nitin

IPC: H03K7/08

CPC classification number: H03K7/08

Abstract: A PWM generator system providing improved duty cycle resolution comprising a sub-cycle generator for generating a sub-cycle with a period that is a small fraction of the maximum PWM period to be generated. An integral sub-cycle estimator is coupled to said sub-cycle generator for determining the integral number of said sub-cycles for on and off time of said PWM waveform, and an additional sub-cycle estimator for determining the additional fractional sub-cycle required to provide said on and off time. A timer is coupled to said integral sub cycle estimator and said additional sub cycle estimator for controlling PWM output switching for the on and off time of the integral and additional fractional sub cycles.

Abstract translation: 一种提供改善的占空比分辨率的PWM发生器系统，包括用于产生具有要产生的最大PWM周期的一小部分的周期的子周期的子周期发生器。 积分子周期估计器耦合到所述子周期发生器，用于确定所述PWM波形的导通和截止时间的所述子周期的整数，以及用于确定所需的额外分数子周期的附加子周期估计器 提供说明开关时间。 定时器耦合到所述积分子周期估计器和所述附加子周期估计器，用于控制用于积分和附加分数子周期的开和关时间的PWM输出切换。