| 摘要 |
PURPOSE:To generate a direct current of the polarity or voltage different from a sole DC power source by a small-size and light-weight circuit by associating a switch circuit, and a rectifier having the first and second diodes and the first and second capacitors. CONSTITUTION:A DC of a voltage V1 with respect to a ground line is applied to a terminal 11 of a switch circuit 1, and a terminal 10 is connected to the ground line. The circuit 1 alternately connects a terminal 12 with a terminal 11 in response to a switching signal of a pulse train of the prescribed period. The terminal 12 is connected with one end of a capacitor C1 of the input terminal side of a rectifier 2. The rectifier 2 has capacitors C1, C2 and diodes D1, D2, and a voltage V2 is applied to the terminal 20 of the anode side of the diode D1. The voltage of the sum or difference of the absolute values of the voltages V1, V2 is obtained from the output terminal 21. When the voltage V2 is set to zero, the negative voltage V1 can be converted to a positive voltage. |
