| 摘要 |
PURPOSE:To increase the economy of a DC power source by employing a voltage across one of two condensers in a double voltage rectifier as an auxiliary power source input for a switching control circuit. CONSTITUTION:A double voltage rectifier is composed of diodes D1, D1' and condensers C1, C1', and this output is inputted to a DC/DC converter which contains a transistor Q1, and the prescribed DC power source output is obtained. A voltage generated across the condensers C1 or C1' of a double voltage rectifier is applied to an auxiliary power source 1 for a switching controller 2. |
