There are many ways to realize the answering machine function, for example the earlier analog circuit, the digital circuit or the analog digital mixing circuit. 实现抢答器功能的方式有多种,可以采用早期的模拟电路、数字电路或模数混合电路。
Taking the design of 8-Vie for the answering device for example, the paper introduces procedure and method of designing digital logical circuit with Max+ plus ⅱ as development software and VHDL as hardware description language. 本文以8路抢答器为例,介绍了在Max+plusⅡ开发软件下,利用VHDL语言设计数字逻辑电路的过程和方法。