基于锁相环集成电路CD4046的红外无线耳机设计

Design of Infrared Wireless Headphone Based on Phase-locked Loop Integrated Circuit CD4046

采用锁相环技术,通过调频方式实现一款红外无线耳机.选用的锁相环器件CD4046是一种低频多功能锁相环集成电路,具有使用简单、VCO中心频率和捕获频率范围可调、功耗低等特点.该调频式红外无线耳机和调幅式红外无线耳机都具有供电方式多样、方向性好、音量可调节功能.但其比调幅式红外耳机具有较宽的带宽和较强的抗干扰性.

Phase-locked loop （PLL） technology is applied to design a kind of FM infrared wireless headphone. CD4046 is a multifunctional PLL integrated circuit in low frequency and has the characters of simple application, adjustable VCO center frequency and adjustable frequency-loc- ked range, low power loss and etc.. The FM infrared wireless headphone has the same function with the AM infrared wireless headphone such as various power supply, good orientation and adjustable volume. But it has wider frequency width and stronger anti-interference than the AM infrared wireless headphone.