The method that transforms analog parameters to digital parameter is called a / d . it is necessary to apply a / d in experimentation and production process 將模擬量轉換為被計算機所認識和接收的數字量,這個過程叫做模擬/數字轉換,簡稱a / d 。
Dba design can enhance the dll circuit ' s robustness and minimize the clock jitter . it also avoids the difficulty of analog parameter design and process control 采用這樣的設計,增加了dll電路的穩(wěn)定性,減小了時鐘抖動,同時避免了模擬電路參數設計和工藝控制的難點。
Many continuously variational prameters in all kinds of acquisition systems are analog parameters . but computer only can process operation according to binary system 在各種自動測量?采集和控制系統(tǒng)中遇到的變量,大多時間上和幅度上都是連續(xù)變化的物理量,即模擬量。
The typical design gets the technical parameters from digital filters that should be designed , and then transformed into the analog parameters of a low - pass analog filter prototype . the prototype is converted into the analog low - pass , high - pass , band - pass and the band - stop filters respectively , which are transformed into the digital ones 典型設計是先按一定規(guī)則將給出的數字濾波器的技術指標轉換成模擬低通濾波器的技術指標,據此產生模擬濾波器原型,然后把模擬低通濾波器原型轉換成模擬低通、高通、帶通、帶阻濾波器,最后再把模擬濾波器轉換成數字濾波器。