Technological progress is sure to supply the necessary components.Moore's law, which holds that the processing power of a single computer chip roughly doubles every 18 months, applies to sensors, too.

技术的进步必然会为这一设想提供技术支持的零部件，而摩尔定律所说的单台计算机芯片的处理能力大概18个月就会翻一番，现在看来同样适用于传感器。

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In this paper, by the use of dual-current control mode and intelligent UC3842 chip as the core, a single-chip switching power supply circuit are presented.

本文使用双电流控制模式，以智能芯片uc 3842为核心，设计了单片开关电源的实用电路。

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The single-chip switching mode power supply based on TOP221Y device is introduced in the paper. The performance characteristic and operation principle is analyzed.

介绍了基于TOP221Y器件设计实现的单片开关电源，分析了其基本的性能特点和工作原理。

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