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提出了一种10位电阻-电阻串(R-R串)DAC，通过电流补偿技术减小了LCD驱动IC中高分辨率电阻串DAC的芯片面积和布线复杂度。该设计在保持低功耗和高均匀性的同时实现了紧凑的布局。
National Tsing Hua University, Hsinchu, Taiwan, National Chi Nan University, Puli, Taiwan, 3 University of California, Los Angeles, CA 2 Achieving a higher color depth for LCD drivers requires a higher DAC resolution and a larger circuit die area. Due to the stringent requirement on uniformity, a resistor-string DAC (RDAC) is predominantly used for LCD column drivers. However, the area of the RDAC and related routing lines are prohibitively large for a high-resolution data converter, making it impractical for column-driver ICs in high color depth displays [1]. To avoid the above-mentioned issue, the following DAC architectures were proposed in the past: a CDAC [2], an embedded DAC [3], DACs with current modulation/interpolation [4-5], and a resistor-resistor-string DAC (RRDAC) without unity-gain buffers [1]. However, the CDAC architecture suffers from a long D/A conversion time. The embedded DAC architecture requires a large number of input transistors with long widths and lengths fo
Chih-Wen Lu1, Ping-Yeh Yin2, Ching-Min Hsiao2, Mau-Chung Frank Chang3