公开(公告)号：US07907115B2

公开(公告)日：2011-03-15

申请号：US12409238

申请日：2009-03-23

申请人： Dong Zheng ,  Robert L. Lyle, Jr. ,  Barry Harvey ,  Brian V. North

发明人： Dong Zheng ,  Robert L. Lyle, Jr. ,  Barry Harvey ,  Brian V. North

IPC分类号： G09G3/36

CPC分类号： H05B41/3927 ,  G09G3/2014 ,  G09G3/3406 ,  H05B41/282

摘要： An apparatus and method for controlling the operation of a utility device, such as a cold cathode fluorescent lamp that is powered in accordance with a pulse width modulation (PWM) signal, includes an analog sensor which monitors the utility device to derive an output signal representative of the PWM signal. An integrating analog-to-digital converter (ADC), which is coupled to the sensor and has its operation synchronized with an integral multiple of the period of the PWM signal, produces an output representative of an average of the output of the utility device.

摘要翻译： 用于控制诸如根据脉宽调制（PWM）信号供电的冷阴极荧光灯的实用设备的操作的装置和方法包括模拟传感器，其监视该效用器件以导出输出信号代表 的PWM信号。 集成模数转换器（ADC），其耦合到传感器并且具有与PWM信号的周期的整数倍同步的操作，产生代表公用设备的输出的平均值的输出。