| 摘要 |
PURPOSE:To increase the variation of the threshold value due to the current variation so as to prevent a current from flowing in a quantity more than necessity to the load by fixing the potential difference between the resistors to a constant value by a constant-voltage element when the source voltage increases. CONSTITUTION:A signal from a signal line 11 is added to the input side of an inversion amplifier 15, through resistors 12 and 13 and the output of the inversion amplifier 15 is added to the input side of an inversion amplifier 16. The output of the inversion amplifier 16 is supplied to an output terminal 17, and at the same time, fed back to the junction point of resistors 12 and 13 through feedback resistors 18 and 14. Constant voltage elements 19 are connected in parallel to both ends of the resistor 18. A signal from the output terminal 17 is supplied into the output circuit 3, to drive an ignition coil 20. |
