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当前位置:商国互联首页> 产品库 > 电子元器件 > 电阻器 > 固定电阻器

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  • 价 格: 面议 / 5
  • 供 应 地:福建省厦门市
  • 发布公司:厦门盈亦自动化科技有限公司
  • 产品型号:Zoom VAC-D8-AZoom
  • 品 牌:Zoom
  • 发布日期:2016/12/15 16:25:02
  • 联系人QQ:3459801480 点击这里给我发消息

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.组合代换  
组合代换就是把同一型号的多块IC内部未受损的电路部分,重新组合成一块完整的IC,用以代替功能不良的IC的方法。对买不到原配IC的情况下是十分适用的。但要求所利用IC内部完好的电路一定要有接口引出脚。  
非直接代换关键是要查清楚互相代换的两种IC的基本电参数、内部等效电路、各引脚的功能、IC与外部元件之间连接关系的资料。实际操作时予以注意:  
⑴集成电路引脚的编号顺序,切勿接错;  
⑵为适应代换后的IC的特点,与其相连的外围电路的元件要作相应的改变;  
⑶电源电压要与代换后的IC相符,如果原电路中电源电压高,应设法降压;电压低,要看代换IC能否工作。  
⑷代换以后要测量IC的静态工作电流,如电流远大于正常值,则说明电路可能产生自激,这时须进行去耦、调整。若增益与原来有所差别,可调整反馈电阻阻值;  
⑸代换后IC的输入、输出阻抗要与原电路相匹配;检查其驱动能力。  
⑹在改动时要充分利用原电路板上的脚孔和引线,外接引线要求整齐,避免前后交叉,以便检查和防止电路自激,特别是防止高频自激;  
[7]在通电前电源Vcc回路里最好再串接一直流电流表,降压电阻阻值由大到小观察集成电路总电流的变化是否正常。 

厦门盈亦自动化科技有限公司
6372625电话  0592-6372625  厦门打6372625 
手机  18030129917
QQ 3001408750

电话  0592-6372625  厦门打6372625 
手机  18030129917
20CE502A3ANNBNB0现货
QQ 3001408750


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厦门盈亦自动化科技有限公司

联系人:付茂强(销售)

手机:18030129917

邮箱:3459801480@qq.com

地址:福建省厦门市厦门市集美区杏林宁海二里禹洲中央海岸

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厦门盈亦自动化科技有限公司

  • 联系人:付茂强(销售)
  • 联系人QQ:3459801480 点击这里给我发消息
  • 手机: 18030129917
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  • 主营产品:施耐德 A-B GE
  • 公司所在地:福建省厦门市