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模拟信号的收集和处理在科学和技术的各个领域中得到了广泛的应用。对一般低速模拟信号而言,通常是将所收集的模拟信号经模-数转换后直接送入计算机进行处理。这时信号的采样频率一般不超过1 MHz,受计算机的响应时间所限制。对高速模拟信号,如要求采样频率在10～20 MHz范围,计算机是无法响应的,必须在计算机和模拟信号采集器之间增加一超高速缓存。在收集数据时,先将所收集到的数据送入缓存,之后再将这批数据通过计算机的接口送入计算机处理。
The collection and processing of analog signals are widely used in all fields of science and technology. For the general low-speed analog signals, the collected analog signals are usually sent directly to the computer for analog-digital conversion. At this time the signal sampling frequency is generally not more than 1 MHz, limited by the response time of the computer. For high speed analog signals, the computer can not respond if the sampling frequency is in the range of 10 ~ 20 MHz. A cache must be added between the computer and the analog signal collector. In the collection of data, the first collected data into the cache, and then these data through the computer interface into the computer processing.