在航空航天、工业自动化等领域,电流/频率转换器主要是对加速度计等电路输出电流进行高精度测量。随着工业技术的发展,对电流/频率转换器的小体积和高性能提出了越来越高的需求。在典型电荷平衡式拓扑结构基础上,提出了一种新的融合模...在航空航天、工业自动化等领域,电流/频率转换器主要是对加速度计等电路输出电流进行高精度测量。随着工业技术的发展,对电流/频率转换器的小体积和高性能提出了越来越高的需求。在典型电荷平衡式拓扑结构基础上,提出了一种新的融合模拟电路及多维数字算法补偿的电流/频率转换电路拓扑方案。其引入分流电路,采用改进的展宽复位逻辑控制算法,并利用单片机进行标度因数温度补偿、非线性补偿和零偏补偿,产品性能较原方案提升1~2个数量级。在工艺结构设计方面,为减小产品体积,对部分子电路进行了多芯片组件系统级封装(System in a Package,SiP)集成设计,通过优化布局布线并对数字板和模拟板进行三维堆叠组装,相对便捷地实现了电路的小型化设计。经数轮迭代,研制的产品经测试性能优异,非线性度小于1.5×10^(-5),零偏小于6nA,标度因数温度系数小于1×10^(-7)/℃,尺寸仅为80mm×60mm×15mm。展开更多
A current-mode DC-DC buck converter with high stability is presented. The loop gain＇s expression of the current-mode converter is derived by employing an advanced model of a current-mode control converter. After anal...A current-mode DC-DC buck converter with high stability is presented. The loop gain＇s expression of the current-mode converter is derived by employing an advanced model of a current-mode control converter. After analyzing the loop gain＇s expression, which illustrates the method of selecting suitable frequency compensation for the control loop,a novel pole-zero tracking frequency compensation is proposed. Based on theoretical analysis, a DC-DC buck converter with high stability is designed with 0.5μm-CMOS technology. The simulated results reveal that the stability of the converter is independent of the load current and the input voltage. Moreover,the converter provides a full load transient response setting time of less than 5μs and overshoots and undershoots of less than 30mV.展开更多
文摘在航空航天、工业自动化等领域,电流/频率转换器主要是对加速度计等电路输出电流进行高精度测量。随着工业技术的发展,对电流/频率转换器的小体积和高性能提出了越来越高的需求。在典型电荷平衡式拓扑结构基础上,提出了一种新的融合模拟电路及多维数字算法补偿的电流/频率转换电路拓扑方案。其引入分流电路,采用改进的展宽复位逻辑控制算法,并利用单片机进行标度因数温度补偿、非线性补偿和零偏补偿,产品性能较原方案提升1~2个数量级。在工艺结构设计方面,为减小产品体积,对部分子电路进行了多芯片组件系统级封装(System in a Package,SiP)集成设计,通过优化布局布线并对数字板和模拟板进行三维堆叠组装,相对便捷地实现了电路的小型化设计。经数轮迭代,研制的产品经测试性能优异,非线性度小于1.5×10^(-5),零偏小于6nA,标度因数温度系数小于1×10^(-7)/℃,尺寸仅为80mm×60mm×15mm。
文摘A current-mode DC-DC buck converter with high stability is presented. The loop gain＇s expression of the current-mode converter is derived by employing an advanced model of a current-mode control converter. After analyzing the loop gain＇s expression, which illustrates the method of selecting suitable frequency compensation for the control loop,a novel pole-zero tracking frequency compensation is proposed. Based on theoretical analysis, a DC-DC buck converter with high stability is designed with 0.5μm-CMOS technology. The simulated results reveal that the stability of the converter is independent of the load current and the input voltage. Moreover,the converter provides a full load transient response setting time of less than 5μs and overshoots and undershoots of less than 30mV.
