一种应用于FSK调制器的数字可编程振荡器  

Digitally Programmable Oscillator for FSK Modulator Applications

作　　者：彭烨[1] 陈昌明[2] 

机构地区：[1]四川理工学院电子与信息工程系,四川自贡643000 [2]四川省盐业学校,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2005年第1期46-48,共3页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

摘　　要：介绍了一种可用作FSK调制器的数字可编程振荡器(DPO)的设计。该振荡器使用一片PLL电路LM565,其VCO的中心振荡频率由8031单片机经由CMOSCD4066开关所接的电阻阵列来控制。在88KHz-678KHz数字可变的频率范围内获得了良好的方波和三角波。将电路改动为一个正弦的DPO后,得到了一个由8031控制的相位连续的BFSK调制输出。The design of a Digitally Programmable Oscillator (DPO) is described for applications in the area of FSK modulator. DPO is designed using a PLL chip LM565, the centre frequency of VCO within which is controlled by 8031 microcontroller using a Resistor Array implemented by CMOS CD4066 switches. Good quality square and triangular waves are obtained from the block whose frequencies in the range of 88KHz to 678KHz are varied digitally. DPO will be a sinusoidal DPO by improving the circuit. A good quality FSK output are easily obtained with good phase continuity which is controlled by using 8031 microcotroller.

关 键 词：可编程振荡器 调制器 数字 8031单片机 应用 PLL电路 FSK调制 CMOS 振荡频率 电阻阵列 频率范围 相位连续 VCO 三角波 DPO 控制 方波 

分 类 号：TN752[电子电信—电路与系统] TN761