| 术语 | sample and hold (S/H) |
| 释义 | sample and hold (S/H) 采样(及)保持;［取样保留］ A first step in making an analogue to digital conversion where highspeed 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. 模拟信号转换为数字信号的第一步工作,在这个过程中形成模拟波的高速数字信号,如在 数字视频与数字语音系统中。这步工作包括在每个采样周期(例如每隔20微秒)期间对电 容器进行充电,并利用采样之间的时间来完成模拟信号到数字信号之间的转换工作。 |
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