论文部分内容阅读
本文介绍的电话接听分机,适用于已装有电话机的家庭作为分机使用,它具有振铃及通话功能,去掉了拨号电路。文章非常适合电子爱好者及初学者。 1.工作原理电路如图1所示。共分为振铃电路、通话电路两部分。
The telephone answering extension that this text introduced is suitable for the family that the telephone has been installed as the extension use, it has ringing and conversation function, have removed the dialing circuit. The article is very suitable for electronic enthusiasts and beginners. 1. The working principle of the circuit shown in Figure 1. Is divided into ring circuit, call circuit in two parts.