6.5MHz调频接收机的优化设计  

Optimized Design of the 6.5 MHz FM Receiver

作　　者：罗素保[1] 田广强[1] 

机构地区：[1]郑州交通职业学院信息工程系,河南郑州450062

出　　处：《科技广场》2010年第8期112-114,共3页Science Mosaic

摘　　要：本文设计了一款采用MC3361构成的新型调频接收机,主要优点是将双平衡双差分混频器、中频放大器、立体声解调器以及静噪电路、限幅放大器、积分鉴频器、滤波器、抑制器、选频电路和电容三点式本机振荡电路集成在一起。该接收机采用了二次变频的方法来提高镜像频率抑制比,提高了接收机的灵敏度,这样可增设多级高放电路而不受镜像频率的干扰。A new type FM receiver is designed by MC3361 in this paper,the main advantage is the integration of double-balanced double-differential mixer, amplifier,stereo demodulator,squelch circuit,limiting amplifier, integral discriminator,filters,suppressors,frequency selective circuit and three-capacitor oscillator circuit of the machine.The receiver used double-conversion to improve image frequency rejection ratio and received sensitivity,the result is to add multi-level circuit without interference of the image frequency.

关 键 词：接收机 MC3361 静噪电路 

分 类 号：TN85[电子电信—信息与通信工程]