| 摘要 |
PURPOSE:To improve the efficiency by constructing a switching power source circuit without using a circuit of transformer coupling when obtaining a DC output on the basis of the DC input supplied from a battery. CONSTITUTION:A choke coil 51 is inserted between a capacitor 34 and the collector of a switching transistor 32, and in case the capacitor 34 is charged by a charging current when the transistor 32 is turned ON, the peak value of the current can be suppressed by the coil 51. Further, the end of the transistor 32 of the coil 51 is discharged from the terminal 14 side end of the capacitor 34 through a diode 52. Thus, the DC output of the polarity of the output voltage which can coincide with DC output supplied from a battery can be provided without using an output transformer. |
