基于数字锁相环的温控变频电路设计

Design of Temperature Frequency Conversion Circuit Based on Digital Phase Locked Loop

CC4046集成电路锁相环采用RC型压控振荡器,外接RC作为充放电元件,电路简单、成本低廉、实用价值大,可广泛应用于广播电视系统,各种通信系统,以及频率合成,自动控制及时钟同步等技术领域。利用数字集成锁相环组成温控变频电路可以克服常见温控系统可靠性低、抗干扰能力差的缺点,为温度的精确测量及需要进行温度检测控制的设备提供了一种可行的电路设计方案。

The CC4046 integrated circuit phase locked loop uses the RC Voltage Controlled Oscillator（VCO）,the exterior conjunction RC component of charge and discharge, the electric circuit is simple, the cost is inexpensive,the practical value is big,and widely used in the broadcast television system, several communications system, frequency synthesis system,automatic control and clock synchronization system. It overcomes these shortcoming such as low reliability and bad anti - interference t6 make use of integrated circuit phase locked loop constitutes to temperature frequency conversion circuit. For the accurate diagraph of temperature and need to carry on a temperature examination a control of the equipments provided a kind of viable electric circuit design a project.rsion