CAJ | 학술논문

基于锁相环技术在通信中的重要作用，设计了锁相环调频发射与接收系统。该系统以锁相环74HC4046为核心，利用锁相环实现系统的调制与解调，石英晶体振荡器用来产生载波信号，通过莲花插座RC A采集音频信号，经运算放大器调理后，输入到锁相环调制，利用音频功放将锁相环输出的解调信号放大输出。该系统抗干扰能力强，功耗低，输出信号稳定，易于在实验室中自制。
기우쇄상배기술재통신중적중요작용，설계료쇄상배조빈발사여접수계통。해계통이쇄상배74HC4046위핵심，이용쇄상배실현계통적조제여해조，석영정체진탕기용래산생재파신호，통과연화삽좌RC A채집음빈신호，경운산방대기조리후，수입도쇄상배조제，이용음빈공방장쇄상배수출적해조신호방대수출。해계통항간우능력강，공모저，수출신호은정，역우재실험실중자제。
Based on the importance of PLL (phase-locked loop) in the field of communication technology ,the system of PLL FM transmitter receiver is designed .The system takes the 74HC4046 phase-locked as the core to achieve the FM transmitting and receiving demodulation function .The use of phase-locked loop achieves modulation and demodulation .The quartz crystal oscillator is used to generate a carrier signal .Audio signal is collected from the outside by Cinch RCA .An operational amplifier is designed to process the acquired audio signal ,which is then input to the phase-locked loop for modulation .An audio amplifier is used to magnify the demodulation output signal of PLL .With the anti-jamming ability ,low power consumption ,and output signal stability ,the system can be easily realized and used in the laboratory .