描述

PQV80020041

每個集成電路的電源、地之間應配置一個去耦電容，它可以濾掉來自電源的高頻噪聲。作為儲能元件，它吸收或提供該集成電路內(nèi)部三極管導通、截止引起的電流變化(di/dt)，從而降低系統(tǒng)噪聲。要選高頻特性好的獨石電容或瓷片電容作去耦電容。每塊印制電路板電源引入的地方要安放一只大容量的儲能電容。由于電解電容的纏繞式結構，其分布電感較大，對濾除高頻干擾信號幾乎不起作用。使用時要與去耦電容成對使用。鉭電容則比電解電容效果更好。抑制高頻的電感
用粗漆包線穿入軸向有幾個孔的鐵氧體芯，就構成了高頻扼制器件。將其串入電源線或地線中可阻止高頻信號從電源/地線引入。這種元件特別適用于隔開一塊印制電路板上的模擬電路區(qū)、數(shù)字電路區(qū)、以及大功率驅(qū)動區(qū)的供電。應該注意的是它必須放在該區(qū)儲能電容與電源之間而不能放在儲能電容與用電器件之間。自恢復保險絲
這是用一種新型高分子聚合材料制成的器件，當電流低于其額定值時，它的直流電阻只有零點幾歐。而電流大到一定程度，它的阻值迅速升高，引起發(fā)熱，而越熱電阻越大，從而阻斷電源電流。當溫度降下來以后能自動恢復正常。這種器件可防止CMOS器件在遇到強沖擊型干擾時引起所謂“可控硅觸發(fā)”現(xiàn)象。這種現(xiàn)象指集成電路硅片的基體變得導通，從而引起電流增大，導致CMOS集成電路發(fā)熱乃至燒毀。

產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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