与PWM相比,PFM的输出电流小,但是因PFM控制的DC/DC变换器在达到设定电压以上时就会停止动作,所以消耗的电流就会变得很小.因此,消耗电流的减少可改进低负荷时的效率.PWM在低负荷时虽然效率较逊色,但是因其纹波电压小,且开关频率固定,所以噪声滤波器设计比较容易,消除噪声也较简单. 技术问答 发布时间 : 2018-12-07 ...
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www.nature.com/scientificreports OPEN Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulses Mika Tateda ,Yuto Iida * & Godai Miyaji * Using a pump–probe technique, the reflectivity of a silicon grating surface irradiated with intense ...
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coatings Article Effects of the Nitrogen Flow Ratio and Substrate Bias on the Mechanical Properties of W–N and W–Si–N Films Li-Chun Chang 1,2, Ming-Ching Sung 3, Li-Heng Chu 4 and Yung-I Chen 3,5,* 1 Department of Materials Engineering, Ming Chi University of Technology, New ...