基于PLL和TA31136的调频接收机设计

Design of FM Receiver Based on PLL and TA31136

基于PLL锁相环频率合成方法,研究一种采用单片机和TA31136实现FM接收机的方法。电路设计采用超外差结构,电路控制采用STC12C5A60S2单片机,可通过按键直接设置接收频率,用LCD1602液晶显示频率,接收频率范围为70~110 MHz,最终实现基于PLL和TA31136的FM接收机。经测试,两本振信号频率准确,接收效果良好,符合设计要求,具有一定的应用价值。

A circuit realization method of FM receiver by using MCU and TA31136 has been discussed in his paper based on the phase - locked loop frequency synthesis method. Adopting super heterodyne structure as the circuit design, and using STC12CSA60S2 microcontroller as the control circuit, the receiver has been devised and receive frequency, whose range is from 70 MHz to 110 MHz can be set up by keys and displayed on LCD1602. Based on PLL and TA31136, the VHF FM receiver has been realized at length with accurate frequency of the local oscillator 2 signal, good receiving effect, and the receiver meets the requirements of the design with certain application value after testing.