应用于低温多晶硅薄膜晶体管液晶显示器之新型互补电流镜式模拟缓冲放大器

摘要

取代传统运算放大器和临界电压补偿型模拟缓冲器,提出了一种新型的互补式电流镜模拟缓冲器,可以利用在低温多晶硅薄膜晶体管液晶显示器驱动电路上.使用 N 型电流镜和 P 型电流镜来交互使用以达到较大的电压输出范围,并且使用一开关控制电路实时控制切换,所以可以提出的电压缓冲器不需要电容或时脉讯号就可以运作,这样可以节省很多布局时所需要的面积,且依然维持良好的线性趋势.%Instead of traditional operational amplifies (OP-AMPs) and threshold voltage compensation type analog buffers, this work presents a novel complementary current mirror (CCM) type analog buffer for in-tegrated data drivers of low-temperature polycrystalline silicon thin-film transistor (LTPS-TFT) displays.The proposed CCM analog buffer makes use of a p-type and an n-type current-mirror-type buffer to achieve large voltage swing. The proposed buffer does not need capacitors and external control signals, so it fea-tures compact size and good linearity.