基于PIC16F877A的混沌信号发生器的设计

Design of Chaotic Signal Generator Based on PIC16F877A

混沌信号源的实现对生物医学、非线性信号处理等领域有着极其重要的意义。提出一种基于PIC16F877A的混沌信号源的解决方案,具有数字化、保密性好、电路简单、信号稳定等优点。具体阐述基于该方案的混沌信号源的硬件和软件的设计和实现过程。以Lorenz混沌方程作为数学模型产生混沌信号源。通过D/A转换、电压放大、混频、调制、功率放大、PCB设计和电路验证,得到能应用于医疗器械的混沌信号源,通过调试,结果表明该设计方案是行之有效的。

Implement of chaotic signal source is of much importance in biological medicine nonlinear signal processing. A new scheme of the generator based on PIC16F877A is presented. The features such as the digitalized processing, good confidentiality,simple circuit,high signal stability show its feasible and wide usage. The design and implement of hardware and software are discussed in detail. Using Lorenz chaotic equations as a mathematical model,The chaotic signal source can be used in medical equipment,through the D/A converters, voltage amplification, mixing, modulation, power amplifier, PCB design and test. The experimental conclusions indicate that the design is feasible and effective.