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摘要:[Footprint Viewer Type]Type=Allegro[Allegro Footprints]Dir0=C:\Cadence\SPB_23.1\share\pcb\pcb_lib\symbols ##自带库Dir1=C:\Cadence\CIP-E\Starter_Library\A
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摘要:Ps(视在功率)=P有用+P无用 (矢量和,非代数和) PF=P有/P视=cosθ
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摘要:1. 示波器置于交流耦合,因为纹波属于交流成分 2. 示波器通道置20Mh带宽限制 3. 用接地弹簧代替探头接地线,较少干扰 4. 在保姆电容外加(并联):(1)10uf电解电容(2)0.1uf的高频瓷片电容
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摘要:`timescale 1ns/100ps module led_key ( //input clk, clk1, reset_n, //skey, //output led ); /******************************** 参数定义 *********************
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摘要:选择电源网络vcc或者gnd, 右键Select Entire Net 选中整个网络, 然后 edit wire properties 最后分析电源流向: 可以看出板子通过usb经过座子给单片机供电
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