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针对现代系统芯片中处理器核等数字模块和模拟模块对于不同电平电源供电的需要,提出一种基于复用技术的新型双通路电荷泵实现方案.该电荷泵能同时提供具有驱动能力的升压和降压模式电压输出,且可实现可变增益组合,以便根据检测到的输入电压自动调整增益组合以提高工作效率.开关阵列和电容的复用降低了芯片和应用电路的成本.文章给出了电荷泵的拓扑结构和用于量化分析的大信号解析公式和小信号模型.电路在TSMC的0.35μm混合信号CMOS工艺下设计完成.仿真验证和流片测试的结果表明所提出的设计目标均已实现,所获结果与解析公式的计算高度一致,证明了模型以及分析方法的正确性.
In order to meet the need of power supply of different levels for digital modules and analog modules, such as processor cores in modern system chips, a novel dual-channel charge pump based on multiplexing technology is proposed. The charge pump can provide both driving capability Voltage and Buck Mode Voltage Outputs and Variable Gain Combinations to Automatically Adjust Gain Combination Based on Detected Input Voltage for Improved Work Efficiency Multiplexing of Switch Arrays and Capacitors Reduces the Cost of Chips and Applications Circuits Out of the charge pump topology and large-signal analytical formula and small signal model for quantitative analysis.The circuit is designed in TSMC’s 0.35μm mixed-signal CMOS process.The results of simulation and flow test show that the proposed design goals The results obtained are highly consistent with the analytical formulas, which proves the correctness of the model and the analysis method.