用密码芯片改进楼宇防盗对讲系统

Improve Building Safty & Talk-back System Using Code-decode IC

本文叙述了用编解码芯片（密码芯片）改进楼宇防盗对讲系统的原理，并给出了电路简图。把密码芯片用于楼宇防盗对讲系统，能有效提高该系统的可靠性和保密性，同时使接线更简单，施工更方便。

The paper gives the principle and circuit of improving building safly & talk-back system for using code-decode IC. After using code-decode IC, it will improve the safly and secrety of the system, and make construct easy.