电路的电源电压为3 ~ 18 V，适用于各种类型的数字逻辑电路的逻辑电平判断。
The circuit supply voltage is 3 ~ 18 v, suitable in logic level of kinds of digital logical circuits.
为减少表面积有机电源电路位于压电薄膜扬声器下面。
The organic powersupply circuit is located under the piezo film speaker to reduce surface area.
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。
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.
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