一种面向彩色CIS数据接口的低功耗编码方法  

Low-Power Encoding Method for Data Interface of Color CIS

作　　者：刘毅[1,2] 杨银堂[1,2] 文博[1] 

机构地区：[1]西安电子科技大学微电子学院,陕西西安710071 [2]西安电子科技大学宽禁带半导体材料与器件教育部重点实验室,陕西西安710071

出　　处：《西南交通大学学报》2010年第4期568-573,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(60776034;60676009);国家自然科学杰出青年基金资助项目(60725415)

摘　　要：为有效降低彩色CMOS(互补金属氧化物半导体)图像传感器数据输出接口的动态功耗,对输出接口信号的活动性进行了分析.根据同色像素信号高六位相关性高、活动性低的特点,提出了一种编码方法.该方法通过比较当前与前一同色像素信号,决定是否保持当前接口信号的高六位,从而显著降低接口信号的活动性.仿真结果表明,用该方法,接口的动态功耗降低了24.2%.To efficiently reduce the dynamic power dissipation of data interface of color CMOS（complementary metal-oxide-semiconductor） image sensor（CIS）,signal activity of the data interface was analyzed.Based on high correlation and low activity of upper 6 bits of the same-color pixel signals,an encoding method was proposed.With this method,whether the upper 6 bits of the current interface signal are held is determined by comparing the current pixel signal with the last same-color pixel signal to decrease the signal activity of the data interface obviously.The simulation results indicate that the dynamic power dissipation of the interface is reduced by 24.2% with the proposed method.

关 键 词：CMOS图像传感器 数据接口 总线编码 

分 类 号：TN401[电子电信—微电子学与固体电子学]