| 摘要 |
PURPOSE:To prevent the breakage of the logic part of an IC for forward and reverse rotation at reverse connection of a power source, in relatively simple constitution. CONSTITUTION:In a DC motor driving circuit, which is controlled by connecting an IC 10 for control of forward and reverse rotation to a DC motor 12, and also connecting the output of an IC for speed control to this IC 10 for control of normal and reverse rotation, A diode 10f is connected in forward direction between a power source terminal and the power input terminal a (b) of the logic part 10e of the IC 10 for control of forward and reverse rotation. |
