| 摘要 |
<p>PURPOSE: To make the supply circuit of a voltage regulator operate, regardless of a phase signal taken out of a generator winding at the time of the start of the generator by a method, wherein an enable signal is supplied to the supply circuit when the voltage of the terminal of a 1st comparing means exceeds a predetermined threshold. CONSTITUTION: When the engine of a car is started and a current generator 2 starts supplying a current, a drive circuit 13 extinguishes an indication lamp 11. By lowering a voltage applied to a resistor 13b below a reference value, the output level of a comparator 18 turned to Lo. However, when the indication lamp 11 is extinguished, a voltage between the terminal L of a voltage regulator 3 and a ground is elevated and reaches the voltage of a battery 1. Thus, even if the output level of the comparator 18 is turned to Lo, the output level of a comparator 17 reaches Hi, so that the enabled state of a supply circuit 15 can be maintained. With this constitution, the supply circuit 15 of the voltage regulator 3 can be made to operate, regardless of a phase signal taken out of one of the windings of a generator 4 at the time of the start of the generator 4.</p> |
