This work proposes a new OLED driver architecture with 10-bit segmented DAC and switched capacitor multiply-by-two circuit application. A 30-channel 10-bit switched capacitor driver chip prototype is implemented in 0.18-μm CMOS technology. In this architecture, the achieved output range is 1.5–4.8V for an input range of 1.5–3.15V, which is suitable for OLED driver with different colors. This architecture is not only converting the digital input signal to analog output for the display panel but also giving amplified high output voltage range. In the segmented DAC, 6-bit coarse DAC and 4-bit fine DAC are used for the input voltage range 1.5–3.15V. In a conventional RDAC for the output voltage of 4.8V, it requires 214 switches i.e., 14-bit RDAC for the same resolution. Hence, conventional RDAC driver is four times larger than the proposed innovative very compact and high speed 10-bit segmented DAC switched capacitor OLED driver. The new architecture drastically reduces the number of switches and complex metal routing which results in reduced power consumption and good settling time. In the proposed OLED driver, no extra buffer is required as switched capacitor op-amp is applied for the same purpose with a gain of more than one. This high-resolution design with small die area also improves the linearity and uniformity with low-power consumption. The post-simulated results show that the OLED driver exhibits the maximum DNL and INL of 0.03 LSB and −0.06 LSB, respectively, with an LSB voltage of 3mV. The one-channel area is 0.586mm × 0.017mm and the settling time is 4.25μs for 30kΩ and 30pF driving load.

中文翻译：

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用于高线性度应用的采用开关电容电路的紧凑型高性能 10 位 30 通道 OLED 驱动器

这项工作提出了一种具有 10 位分段 DAC 和开关电容器乘二电路应用的新 OLED 驱动器架构。30通道10位开关电容驱动芯片原型在0.18-μ米CMOS技术。在此架构中，实现的输出范围为 1.5–4.8输入范围为 1.5–3.15 的 VV，适用于不同颜色的OLED驱动。这种架构不仅将数字输入信号转换为显示面板的模拟输出，还提供放大的高输出电压范围。在分段 DAC 中，6 位粗调 DAC 和 4 位精调 DAC 用于输入电压范围 1.5–3.15V. 在常规 RDAC 中，输出电压为 4.8五、需要214开关，即相同分辨率的 14 位 RDAC。因此，传统的 RDAC 驱动器比建议的创新的非常紧凑和高速的 10 位分段 DAC 开关电容 OLED 驱动器大四倍。新架构大大减少了开关的数量和复杂的金属布线，从而降低了功耗并延长了稳定时间。在建议的 OLED 驱动器中，不需要额外的缓冲器，因为开关电容运算放大器用于相同目的，增益超过 1。这种具有小芯片面积的高分辨率设计还以低功耗提高了线性度和均匀度。后模拟结果表明，OLED 驱动器的最大 DNL 和 INL 为 0.03 LSB，并且-分别为 0.06 LSB，LSB 电压为 3毫伏。一通道面积为0.586毫米×0.017mm，稳定时间为 4.25μs 为 30ķΩ和 30pF 驱动负载。