说明：  本设计对＋5V,+12V低压线性稳压电源的基本电路原理，各器件的参数计算选择，相关技术要求和实际使用中的有关问题进行了阐述。 本设计规范适用于电子设备用小功率低压线性稳压电源电路的设计
(The design of 5 V,+ 12V low-voltage linear regulator power supply of the basic circuit, the device s parameters choice, relevant technical requirements and the actual use of the relevant issues are described. The design specifications for electronic equipment with low-power low-voltage linear regulator power supply circuit design)