Design and Analysis of a Step-Down Charge Pump Switching Power Chip

随着电子信息产业的高速发展，对电源系统提出了更高的要求，传统的电源已经不能满足日益严格的要求。开关电源作为绿色电源，具有效率高，体积小，精度高等优点，已被广泛应用于各种电子设备。电容型开关电源比起电感型开关电源，具有安装尺寸小，噪声小，成本低等优点。因此在低功率便携设备中，采用电容型开关电源更合适些。 本文设计了一款高频、大功率的降压型DC/DC电源芯片。首先阐述了开关电源的基本原理和各种分类，重点说明了降压型电荷泵的工作原理；随后根据设计的要求和指标进行了电路的总体设计，完成了各个子电路的原理分析，电路设计。其中重点阐述了带隙基准源电路，电压误差放大电路、振荡电路、逻辑控制电路、保护电路的...Along with the rapid development electronic information industry and the increasing demands of energy saving, the traditional power supply can not meet the increasingly stringent requirements. Switching mode power supply as green power, with its high efficiency, compact volume and good line regulation, has been widely applied in most of electronic fields. Charge Pump than the inductance-type switc...学位：工学硕士院系专业：物理与机电工程学院物理学系_物理电子学学号：1982008115302

円形マイクロホンアレーによる全方位話者追尾

東京電機大

汎用性の高いデジタルフィルタ設計システムの検討

東京電機大

Design on Optimizing Configuration of Savonius Rotor

对传统SAVOnIuS型垂直轴风力机各几何参量进行优化,在此基础上加入一种半自动阀门装置,得到的新型SAVOnIuS风力机,在设计风速10 M/S下,对其各项空气动力学性能参数进行计算。结果表明,这种风力机具有很好的开发意义,可应用于沿海地区民宅的小型风力发电,城市公共照明及景区夜景工程的离网供电。This paper mainly optimized the different parameters of conventional Savonius rotor and further attempted to insert valves on the concave side of blade.The aerodynamic performance of this optimum configuration of Savonius rotor was calculated on the basis of the nominal velocity V=10 m/s.The computing results indicated that the optimum Savonius rotor could be used in these fields such as small-scale production of electricity for home use in seaboard,city public lighting and beauty spot night lighting.福建省重大科技项目资助(No.2006H0092