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1. 华南师范大学 物理与电信工程学院,广东 广州,510006
2. 广东省高等学校量子信息技术重点实验室, 广东 广州 510006,E-mail:underson2003@yahoo.com.cn
收稿日期:2009-08-10,
修回日期:1900-01-02,
网络出版日期:2010-04-30,
纸质出版日期:2010-04-30
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林志成;邵庆益;陈阿青. 一种用于LCD驱动的低功耗输出缓冲放大器[J]. 液晶与显示, 2010,25(2): 220-224
LIN Zhi-cheng;SHAO Qing-yi;CHEN A-qing. Low-Power Buffer Amplifier for LCD Driver[J]. 液晶与显示, 2010,25(2): 220-224
在AB类输出级的基础上
结合正反馈辅助的B类输出级
提出了一种用于LCD 驱动电路的大输出摆率、低功耗的输出缓冲放大器。在0.15 m高压CMOS工艺模型下
该放大器能够驱动0~20 nF范围的容性负载
静态电流为7 A
1%精度建立时间小于6 s
满足了LCD驱动电路行建立时间的要求;通过采用共源共栅频率补偿结合输出零点补偿技术
较好地满足了大动态范围容性负载的要求。
A high driving capability CMOS buffer amplifier with high slew-rate
low power consumption is proposed. Low power and high driving capability are achieved by using a Class AB push-pull stage and two Class B auxiliary stages with positive feedback. The design buffer amplifier draws 7 A static current and the setting time to 1% precision is less than 6 s under a 0~20 nF capacitance load with a 0.15 m CMOS model
which satisfies the setting time requirement of LCD driving circuit; By using cascoded frequency compensation combined with zero formed with the capacitive loads
large dynamic range of capacitive loads is satisfied.
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