应用于AMOLED源极驱动的具有DAC功能的输出缓冲器设计

孙蕊; 邓红辉; 张俊; 权磊; 贾晨

doi:10.37188/YJYXS20203509.0938

您当前的位置：

首页 >

文章列表页 >

应用于AMOLED源极驱动的具有DAC功能的输出缓冲器设计

驱动电路 | 更新时间：2020-09-08

- 应用于AMOLED源极驱动的具有DAC功能的输出缓冲器设计
- Design for AMOLED source driver output buffer with DAC function
- 液晶与显示 2020年35卷第9期页码：938-945
- 作者机构：
  
  1.合肥工业大学微电子设计研究所, 安徽合肥 230009
  2.深圳清华大学研究院, 广东深圳 518057
- 作者简介：
  
  [ "孙蕊(1995-), 女, 安徽明光人, 硕士研究生, 2017年于合肥工业大学获得学士学位, 主要研究方向为模拟集成电路设计和OLED显示驱动。E-mail:SR1995_sunrui@163.com" ]
  [ "邓红辉(1973-), 女, 湖南娄底人, 副研究员, 硕士, 2002年于合肥工业大学获得硕士学位, 主要研究方向为高性能A/D转换器、D/A转换器、电源管理芯片、PLL等模拟/混合信号电路设计等。E-mail:denghonghui@hfut.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(61704043);重点实验室基金项目(6142802180101);深圳市科创委技术攻关项目(JSGG20170413153845042)
- DOI：10.37188/YJYXS20203509.0938
  中图分类号： TP394.1;TH691.9
- 收稿日期：2020-02-03，
  
  修回日期：2020-03-05，
  
  录用日期：2020-3-5，
  
  纸质出版日期：2020-09-05
- 稿件说明：
移动端阅览
孙蕊, 邓红辉, 张俊, 等. 应用于AMOLED源极驱动的具有DAC功能的输出缓冲器设计[J]. 液晶与显示, 2020,35(9):938-945.

Rui SUN, Hong-hui DENG, Jun ZHANG, et al. Design for AMOLED source driver output buffer with DAC function[J]. Chinese journal of liquid crystals and displays, 2020, 35(9): 938-945.
孙蕊, 邓红辉, 张俊, 等. 应用于AMOLED源极驱动的具有DAC功能的输出缓冲器设计[J]. 液晶与显示, 2020,35(9):938-945. DOI： 10.37188/YJYXS20203509.0938.

Rui SUN, Hong-hui DENG, Jun ZHANG, et al. Design for AMOLED source driver output buffer with DAC function[J]. Chinese journal of liquid crystals and displays, 2020, 35(9): 938-945. DOI： 10.37188/YJYXS20203509.0938.

摘要

针对AMOLED驱动芯片小面积、高精度、低功耗的需求，设计了一种具有DAC功能的高性能输出缓冲器。该缓冲器采用轨对轨的输入级和Class AB输出级以适应大的输入输出电压范围，采用Cascode Miller补偿以减小补偿电容大小，其尾电流源可编程以实现4 bit DAC功能插值，节约了整体功耗和芯片面积。在UMC80 nm CMOS工艺下，仿真结果表明，在0.2~6.3 V的输入电压范围内，缓冲器直流增益大于70 dB，相位裕度大于60°，静态电流最小可至0.5 μA，建立时间低至1.49 μs；典型中压3.3 V的情况下，直流增益可达129 dB，相位裕度为75°，增益带宽为9.4 MHz，静态电流为1.3 μA；对60 mV输入电压进行4 bit插值后，输出误差小于0.255 mV。设计的缓冲器精度高、建立时间快且功耗低，输出缓冲器实现了第二级DAC的作用，满足了AMOLED源极驱动的应用需求。

Abstract

To meet the requirements of small area

high precision and low power consumption of AMOLED driver chip

a high performance output buffer with DAC function is designed. This buffer adopts rail-to-rail input stage and Class AB output stage to adapt to a large input and output voltage range

and uses Cascode Miller compensation to reduce the size of the compensation capacitor. Its tail current source is programmable to implement 4 bit DAC function interpolation

saving overall power consumption and chip area. Under the UMC80 nm CMOS process

the simulation results show that in the input voltage range of 0.2~6.3 V

the DC gain of the buffer is greater than 70 dB

the phase margin is greater than 60°

the quiescent current can be as low as 0.5 μA

and the settling time as low as 1.49 μs. With a typical medium voltage of 3.3 V

the DC gain can reach 129 dB

the phase margin is 75°

the gain bandwidth is 9.4 MHz

and the quiescent current is 1.3 μA. After 4 bit interpolation of the 60 mV input voltage

the output error is less than 0.255 mV. The designed buffer has high accuracy

fast settling time

and low power consumption. The output buffer realizes the role of the second-stage DAC

which meets the application requirements of AMOLED source driving.

关键词

Keywords

references

李继军 , 聂晓梦 , 甄威 , 等 . 显示技术比较及新进展 . 液晶与显示 , 2018 . 33 ( 1 ): 74 - 84 . http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1377207&Fpath=&index=-1&l=zh http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1377207&Fpath=&index=-1&l=zh .

J J LI , X M NIE , W ZHEN , 等 . New developments and comparisons in display technology . Chinese Journal of Liquid Crystals and Display , 2018 . 33 ( 1 ): 74 - 78 . http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1377207&Fpath=&index=-1&l=zh http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1377207&Fpath=&index=-1&l=zh .

LEE P M, CHEN H Y. Adjustable gamma correction circuit for TFT LCD[C]// Proceedings of 2005 IEEE International Symposium on Circuits and Systems . Kobe, Japan: IEEE, 2005: 780-783.

HUANG T, LI H G. Based on programmable current buffer 10-Bit DAC for AMOLED source driver[C]// Proceedings of 2017 International conference on Electron Devices and Solid-state Circuits .Hsinchu, Taiwan, China: IEEE, 2017: 1-2.

C W LU , P Y YIN , C M HSIAO , 等 . A 10-bit resistor-floating-resistor-string DAC (RFR-DAC) for high color-depth LCD driver ICs . IEEE Journal of Solid-State Circuits , 2012 . 47 ( 10 ): 2454 - 2466 . DOI: 10.1109/JSSC.2012.2206684 http://doi.org/10.1109/JSSC.2012.2206684 .

孟宇 , 尹勇生 , 宇跃峰 , 等 . 应用于AMOLED源极驱动的高精度DAC设计 . 液晶与显示 , 2019 . 34 ( 4 ): 379 - 385 . http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1382763&Fpath=&index=-1&l=zh http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1382763&Fpath=&index=-1&l=zh .

Y MENG , Y S YIN , Y F YU , 等 . High precision DAC design for AMOLED source drive . Chinese Journal of Liquid Crystals and Displays , 2019 . 34 ( 4 ): 379 - 385 . http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1382763&Fpath=&index=-1&l=zh http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1382763&Fpath=&index=-1&l=zh .

H C SEOL , S K HONG , O K KWON . An area-efficient high-resolution resistor-string DAC with reverse ordering scheme for active matrix flat-panel display data driver ICs . Journal of Display Technology , 2016 . 12 ( 8 ): 828 - 834 . DOI: 10.1109/JDT.2016.2526042 http://doi.org/10.1109/JDT.2016.2526042 .

李有慧 . 一种输入输出轨到轨CMOS运算放大器的设计 . 电子科技 , 2015 . 28 ( 6 ): 165 - 169 .

Y H LI . An input output rail-to-rail CMOS operational amplifier design . Electronic Science & Technology , 2015 . 28 ( 6 ): 165 - 169 .

马玉杰.恒跨导CMOS轨对轨运算放大器设计[D].兰州: 兰州大学, 2013.

MA Y J. Design of constant Transconductance CMOS rail-to-rail operational amplifier[D]. Lanzhou: Lanzhou University, 2013.

S KANGJ , J H KIM , S Y KIM , 等 . 10-bit driver IC using 3-bit DAC embedded operational amplifier for Spatial Optical Modulators (SOMs) . IEEE Journal of Solid-State Circuits , 2007 . 42 ( 12 ): 2913 - 2922 . DOI: 10.1109/JSSC.2007.908690 http://doi.org/10.1109/JSSC.2007.908690 .

王为之 , 靳东明 . 一种采用共栅频率补偿的轨到轨输入/输出放大器 . 半导体学报 , 2006 . 27 ( 11 ): 2025 - 2028 .

W Z WANG , D M JIN . Rail-to-rail input/output amplifier using common-gate frequency compensation . Chinese Journal of Semiconductors , 2006 . 27 ( 11 ): 2025 - 2028 .

ITO R, ITAKURA T, MINAMIZAKI H. A class AB amplifier for LCD driver[C]// Proceedings of 2007 IEEE Symposium on VLSI Circuits . Kyoto, Japan: IEEE, 2007: 148-149.

陈宏 , 曾龄宇 , 胡乔 , 等 . 一种用于轨到轨运算放大器的新型频率补偿结构 . 微电子学 , 2011 . 41 ( 1 ): 15 - 18 .

H CHEN , L Y ZENG , Q HU , 等 . A novel frequency compensation structure for rail-to-rail operational amplifier . Microelectronics , 2011 . 41 ( 1 ): 15 - 18 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

中小屏幕TFT-LCD源驱动器电路设计