This paper introduces a kind of DC-DC PWM switching mode power supply driven by VMOS and applied to Program Exchange. The principle and circuit are presented.
介绍了一种用于程控交换机的由VMOS管驱动的DC - DC PWM开关电源的工作原理与电路设计。
Are rising prices in China driven by the supply of meat or money?
中国物价上涨背后是肉类还是货币供应问题?
An increase forced by higher demand is less dangerous than one driven by constricted supply, because it is evidence of a healthy global economy.
因更高需求而起的涨价比起起供应紧张而起的要来得少些危险,因为这样证明了全球经济是健康的。
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