The device includes a cellphone circuit, a GPS positioning unit, and a microphone and loudspeaker.
这个装置包含了一个无线电话电路，全球定位系统单元，一个扬声器和一个喇叭。
2
With rapid development of the Large Scale Integrated circuit and wireless communication technology, people no longer satisfied with the conference system made by one microphone and two sound boxes.
随着大规模集成电路和无线通信技术的飞速发展，人们不再满足过去那种一只话筒、两个音箱的会议模式。
3
For Computer Aided Design of silicon microphone, build up a new silicon microphone analogy circuit.