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为了突破限制,改进双极性方波电路在常规设计上的不足,充分发挥其在科研、医疗、工业自动化等现代测控系统中的关键性作用,论文顺应高精度、高可靠、低碳化的技术发展趋势,首先从电源精度、电路参数、温度漂移等方面详细分析了常用双极性方波电路存在制约因素,基于闭环控制原理,描述了系统设计思路,再采用数字电路与模拟电路相结合的方法,借助模型仿真,设计了一种新型的自对称双极性方波信号调理电路,最后,通过理论分析与实际产品的测试,验证了该电路不仅显著提高了方波信号的对称性与稳定性,而且电路配置简洁,具有良好的性价比,可满足高性能、批量化的应用需求。
In order to break the limitation and improve the shortcomings of the conventional bipolar square wave circuit design, give full play to its key functions in modern measurement and control system such as scientific research, medical treatment and industrial automation. The paper follows the technology of high precision, high reliability and low carbonization According to the principle of closed-loop control, the design principle of the system is described, and then the combination of digital circuit and analog circuit is used Method, a new self-symmetric bipolar square-wave signal conditioning circuit is designed by means of model simulation. Finally, the theoretical analysis and actual product testing show that the circuit not only significantly improves the symmetry and stability of the square wave signal And the circuit configuration is simple, with good price, to meet the high-performance, batch applications.