| 摘要 |
PURPOSE:To stabilize DC output of constant voltage and current to be supplied to the load, by a method wherein switching pulse width or period in a switching pulse generator is controlled by detecting output obtained from a detecting resistor of detecting means. CONSTITUTION:A current mirror circuit MV constitutes voltage detecting means DV, and primary side between input end A and common end C of the current mirror MV is connected between DC output ends 16a, 16b. The input end A of MV is connected through an input resistor 21 to the DC output end 16a, and the common end C of MV is connected to the DC output end 16b through primary side between input end A and common end C of a current mirror circuit MI to constitute current detecting means DI. Output end B of the current mirror MV is grounded through a detecting resistor 22, and further output end B of the current mirror MI is grounded through the detecting resistor 22. In this constitution, DC output to be supplied to the load can be made constant voltage and current quite stably. |
