系统晶片式的声音触发控制器

The controller comprises: a trigger source is as inductor; a voltage adjuster adjusts induced voltage as a selection for receiving and playing back a radio; an amplifier magnifies a weak voltage difference between receiving and playing back signal to a triggering signal to push next stage, and the triggering signal is as a signal source for next stage. The acoustic triggering controller completes acoustic control function for receiving and playing back a radio by only one trigger source needed, without need of additional multiple transistors, resistors and capacitors. Only one resistor is needed to adjust gain of amplifier. The controller reduces integral size of circuits greatly so as to make the circuits into a chip inside IC. Thus, manufacturing cost is reduced.