CAJ | 학술논문

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0.15μm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7μA,1%精度建立时间小于6μs,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.
재AB류수출급적기출상,결합정반궤보조적B류수출급,제출료일충용우LCD구동전로적대수출파솔、저공모적수출완충방대기.재0.15μm고압CMOS공예모형하,해방대기능구구동0～20 nF범위적용성부재,정태전류위7μA,1%정도건립시간소우6μs,만족료LCD구동전로행건립시간적요구;통과채용공원공책빈솔보상결합수출영점보상기술,교호지만족료대동태범위용성부재적요구.
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 μA static current and the setting time to 1% precision is less than 6 μs under a 0～20 nF capacitance load with a 0. 15 μm 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.