作　　者： ; ;

机构地区： 黄冈师范学院物理科学与技术学院

出　　处： 《淮阴工学院学报》 2007年第1期42-44,65,共4页

摘　　要： 选用音频动态压扩器SL5020P、鉴频器TX14570L、声表面波滤波器RO2164D和变容二极构成调频器,设计并制作了一种具有动态压扩和静音功能的U波段(860MHz)调频无线话筒发射和接收机,给出了完整电路,并较为详细地阐述了设计思路。该电路具有调试简单、频率稳定、声音清晰、成本低廉等特点,用于多媒体教室的无线扩音系统效果良好。 U wave band （860MHz ） frequency modulation wireless microphone transmitter and receiver with dynamic pressure -expansion and mute function was designed by selecting the SLS020P for compressing and expanding the dynamic range of an audio signal, the TX14570L for discriminator, RO2164D and hypercap diodee for frequency modulator. Complete electro - circuit and idea of design were elaborated in detail. This product has the characteristics of simple debugging, stable frequency, clear sound and low cost, which has achieved good effect in its wide use of wireless amplifier system in our multimedia classrooms.

关 键 词： 无线话筒

领　　域： [电子电信]