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对“快而不干净”的电源的最佳选择,是三线固定式稳压电源以及齐纳二极管加晶体管的组合。这些基本的电路,适合多方面的良好应用,但它们具有局限性,很有可能是‘事倍功半’。例如,大多数固定式稳压电源,它的输出电流受到限制,大约只有IA左右。而在要求功率更大的场合,常常采用增加分流的晶体管,以提高最大输出电流,但是给电源的调节带来了困难。具有较大输出电流(SA)的固定式稳压电源,由于费用过高而不宜
The best choice for a “fast and dirty” power supply is a combination of a three-wire fixed regulated power supply and a Zener diode plus transistor. These basic circuits, suitable for many good applications, but they have limitations, it is likely to be more effective. For example, most fixed power supply, its output current is limited, only about IA. Where power requirements are greater, transistors that increase shunt current are often used to maximize the maximum output current, but the power supply is difficult to adjust. Fixed power supply with larger output current (SA) is not suitable due to high cost