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文章介绍小功率线性稳压电源的两种优化设计方案。其特点是能大大简化电路设计，提高电源效率，使人们多年来所追求的无电源变压器式线性稳压电源成为现实
The article introduces two kinds of optimal design schemes of low power linear regulated power supply. Its characteristics can greatly simplify the circuit design, improve power efficiency, so that people over the years the pursuit of non-power transformer linear power supply becomes a reality