稳压二极管作成的简单稳压电源,现已广泛用于各种仪表及其它电子线路中。在设计此类稳压电源时, 《电子电位差计的原理及维修》(国防工业出版社)、《晶体管电路设计》(日本池原典利等著)等资料,介绍了已知或设定输入电压(u_1、U_1),选择工作电流(I_W),求稳压电阻(R_1、R_2)的方法。这种方法,因为没有把要求的稳压精度指标参与设计计算,故一次设计出来的线路,设计精度与要求的精度不一定正好合适,往往需要多次试算,方能满意。稳压电源在保持其工作电流(I_W)和负载电流(I_L)不变的条件下,稳压精度是会随着稳压电阻增大(为了保持I_W不变,当然要相应提高U_1)而有所提高,但此种提高是有极限的。若能方便地推算出此极限值,对我们设计稳压电源也是很好的一个参考,更能心中有数。在变化万千的实际电子线路中,可能碰到需要各种不同精度的稳压电源。如何根据负载 Zener diode made of a simple power supply, is now widely used in various instruments and other electronic circuits. In the design of this type of regulated power supply, “Electronic Potential Difference Principle and Maintenance” (National Defense Industry Press), “transistor circuit design” (Japan’s Chiwahara and other information), introduced the known or set input Voltage (u_1, U_1), select the operating current (I_W), and find the voltage regulator (R_1, R_2) method. This method, because the regulator does not require the accuracy of the indicators involved in the design and calculation, so the design of the circuit, design accuracy and accuracy requirements are not necessarily just right, often require multiple trial to be satisfied. Regulated power supply to maintain its operating current (I_W) and load current (I_L) under the same conditions, the voltage regulator accuracy will increase with the regulator (in order to maintain I_W unchanged, of course, should be a corresponding increase U_1) And there However, this increase has its limits. If we can easily calculate this limit, we design a regulated power supply is also a good reference, but also know what to expect. In the ever-changing real electronic circuits, you may encounter the need for a variety of different precision power supply. How to load according to