In this brief an original scheme, exploiting the trans-conductive loop implemented through the bulk terminal of the PMOS transistors of cross-coupled charge pumps, is proposed to achieve the regulation of the output voltage of a charge pump. As compared to the conventional regulation schemes, the proposed one achieves wide regulation ranges in terms of input voltage and clock frequency, while achieving low circuit complexity. The solution is theoretically analyzed and exploited in a design example implemented in a 130-nm CMOS process and supplied by a single silicon photovoltaic cell. Experimental results show the effectiveness of the proposed regulation scheme when operating around the maximum power point. It provides a simple and effective solution with good performance in terms of line and load regulation, equal to 107μV107\mu \text{V} /mV and 3.97 mV/ μA\mu \text{A} , respectively, a power conversion efficiency of about 65% and an outstanding power density of 83 μW\mu \text{W} /mm2.

中文翻译：

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双支路交叉耦合电荷泵的大电流调节技术


在本简报中，提出了一种原始方案，利用通过交叉耦合电荷泵的 PMOS 晶体管的体端子实现的跨导环路来实现电荷泵输出电压的调节。与传统的调节方案相比，所提出的方案在输入电压和时钟频率方面实现了较宽的调节范围，同时实现了较低的电路复杂性。该解决方案在理论上进行了分析，并在一个采用 130 nm CMOS 工艺实现并由单硅光伏电池供电的设计实例中得到了应用。实验结果表明，在最大功率点附近运行时，所提出的调节方案是有效的。它提供了一种简单有效的解决方案，在线路和负载调节方面具有良好的性能，分别等于 107μV107\mu \text{V} /mV 和 3.97 mV/ μA\mu \text{A} ，功率转换效率为约 65%，功率密度高达 83 μW\mu \text{W} /mm2。