tone circuit

The application of type RC tone control circuit to the Hi-Fi amplifier

RC型音调控制电路在高传真扩音机中的应用

design and implementation of one kind of color ring back tone circuit

一种彩铃电路的设计与实现

Cover open alarm, open the lid if the case of dehydration through the alarm, closed the lid, and then to continue until dehydration; external buzzer circuit is mainly used for touch-tone or buzzer alarm use.

桶盖打开则报警，若脱水时遇桶盖打开则通过显示报警，直到闭合桶盖后才能继续脱水处理；外接蜂鸣器电路主要用于按键音提示或者鸣叫报警。

The types of-voice signals considered include voiceband data , network signalling, circuit continuity tones, and dual-tone-frequency signalling.

考虑的 非话音 信号的类型包括:话带数据 、 网络信令 、 电路连接单音以及多音多频信令.