FSK 移频键控实现数字信号的调制
JIANG.......
（陕西理工学院物理与电信工程学院通信 1103 班，陕西 汉中 723003）
指导教师：XIONG......
【摘 要】
移频键控，或称数字频率调制。其基本原理是利用载波的
频率变化来传输数字信号，实现现代科技的需求。需被传送的数字信号与高频载
波 1 一起经过 MC1496 相乘器 1，另外让数字信号经过 74LS04 反相器再与高频
载波 2 一起经过 MC1496 相乘器 2，使芯片工作于高电平；让输出的已调信号
通过放大电路，再将俩已调信号经由 74LS283 相加器输出调制信号。实际电路
板连接电路，通电测试可得正确波形。
【关 键 词】
相乘器；反相器；放大电路；相加器
【中图分类号】 TN702 【文献标志码】A
Modulation of FSK frequency shift keying digital signal
Jiang ......
(GradeXX,Class11,Major of Communication Engineering，School of Physics and
telecommunication Engineering of Shaanxi University of Technology, Hanzhong 723003,China)
Tutor: Xiong ......
[Abstract]
Frequency shift keying, digital frequency modulation. The basic principle is
to transmit digital signals by using carrier frequency, modern science and technology needs. To
digital signal and the high frequency carrier wave is transmitted in 1 with MC1496 multiplier 1, in
addition to the digital signal through the 74LS04 inverter with high frequency carrier 2 with 2
MC1496 multiplier, the chip work in high level; let the output modulated signal by amplifying
circuit, then the two modulated signal via a 74LS283 adder output the modulated signal. The
actual circuit board connecting circuit, power on test can correctly waveform.
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