1746-NT4
1746-NT4ADC的發(fā)展
隨著電子技術(shù)的迅速發(fā)展以及計(jì)算機(jī)在自動(dòng)檢測(cè)和自動(dòng)控制系統(tǒng)中的廣泛應(yīng)用,利用數(shù)字系統(tǒng)處理模擬信號(hào)的情況變得更加普遍。數(shù)字電子計(jì)算機(jī)所處理和傳送的都是不連續(xù)的數(shù)字信號(hào),而實(shí)際中遇到的大都是連續(xù)變化的模擬量,模擬量經(jīng)傳感器轉(zhuǎn)換成電信號(hào)的模擬量后,需經(jīng)模/數(shù)轉(zhuǎn)換變成數(shù)字信號(hào)才可輸入到數(shù)字系統(tǒng)中進(jìn)行處理和控制,因而作為把模擬電量轉(zhuǎn)換成數(shù)字量輸出的接口電路-A/D轉(zhuǎn)換器是現(xiàn)實(shí)世界中模擬信號(hào)向數(shù)字信號(hào)的橋梁,是電子技術(shù)發(fā)展的關(guān)鍵和瓶所在。
自電子管A/D轉(zhuǎn)換器面世以來(lái),經(jīng)歷了分立半導(dǎo)體、集成電路數(shù)據(jù)轉(zhuǎn)換器的發(fā)展歷程。在集成技術(shù)中,又發(fā)展了模塊、混合和單片機(jī)集成數(shù)據(jù)轉(zhuǎn)換器技術(shù)。在這一歷程中,工藝制作技術(shù)都得到了很大改進(jìn)。單片集成電路的工藝技術(shù)主要有雙極工藝、CMOS工藝以及雙極和CMOS相結(jié)合的BiCMOS工藝。模塊、混合和單片集成轉(zhuǎn)換器齊頭發(fā)展,互相發(fā)揮優(yōu)勢(shì),互相彌補(bǔ)不足,開(kāi)發(fā)了適用不同應(yīng)用要求的A/D和D/A轉(zhuǎn)換器。近年來(lái)轉(zhuǎn)換器產(chǎn)品已達(dá)數(shù)千種。
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