PQV80020041

描述

PQV80020041

每个集成电路的电源、地之间应配置一个去耦电容，它可以滤掉来自电源的高频噪声。作为储能元件，它吸收或提供该集成电路内部三极管导通、截止引起的电流变化(di/dt)，从而降低系统噪声。要选高频特性好的独石电容或瓷片电容作去耦电容。每块印制电路板电源引入的地方要安放一只大容量的储能电容。由于电解电容的缠绕式结构，其分布电感较大，对滤除高频干扰信号几乎不起作用。使用时要与去耦电容成对使用。钽电容则比电解电容效果更好。抑制高频的电感
用粗漆包线穿入轴向有几个孔的铁氧体芯，就构成了高频扼制器件。将其串入电源线或地线中可阻止高频信号从电源/地线引入。这种元件特别适用于隔开一块印制电路板上的模拟电路区、数字电路区、以及大功率驱动区的供电。应该注意的是它必须放在该区储能电容与电源之间而不能放在储能电容与用电器件之间。自恢复保险丝
这是用一种新型高分子聚合材料制成的器件，当电流低于其额定值时，它的直流电阻只有零点几欧。而电流大到一定程度，它的阻值迅速升高，引起发热，而越热电阻越大，从而阻断电源电流。当温度降下来以后能自动恢复正常。这种器件可防止CMOS器件在遇到强冲击型干扰时引起所谓“可控硅触发”现象。这种现象指集成电路硅片的基体变得导通，从而引起电流增大，导致CMOS集成电路发热乃至烧毁。

产品承诺：
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保 证 安全准时发货，
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优势价格，大量现货。

主营DCS系统配件
机器人系统配件
大型伺服系统配件
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