A first step in making an analogue to digital conversion where highspeed digitizing of analogue waves is performed; for example, in digital video and digital speech systems. It consists of charging a capacitor during each sample period (say, every 20 microseconds) and using the period between sampling to perform the A/D conversion.; 模擬信號(hào)轉(zhuǎn)換為數(shù)字信號(hào)的第一步工作,在這個(gè)過程中形成模擬波的高速數(shù)字信號(hào),如在 數(shù)字視頻與數(shù)字語音系統(tǒng)中。這步工作包括在每個(gè)采樣周期(例如每隔20微秒)期間對(duì)電 容器進(jìn)行充電,并利用采樣之間的時(shí)間來完成模擬信號(hào)到數(shù)字信號(hào)之間的轉(zhuǎn)換工作。