Internal combustion engine ignition device

An internal combustion engine ignition device, in which an on-off control of current for energizing an ignition coil is performed by a switching element upon receiving a control signal, and an output terminal for externally outputting an ignition state of the ignition coil is provided, the internal combustion engine ignition device comprising:

• voltage converting means for converting the current to a voltage, the converted voltage being referred to as a sense voltage;
• first comparing means for comparing the sense voltage with each of two reference voltages, the two reference voltages being a first detection reference voltage for detecting the sense voltage at a time of rise and a first release reference voltage which is a voltage lower than the first detection reference voltage, to output a first output signal, the first comparing means having a hysteresis characteristic;
• second comparing means for comparing the sense voltage with each of two other reference voltages, the two reference voltages being a second detection reference voltage for detecting the sense voltage at a time of rise and a second release reference voltage which is a voltage lower than the second detection reference voltage and higher than the first detection reference voltage, to output a second output signal, the second comparing means having a hysteresis characteristic;
• output means for receiving the first output signal output from the first comparing means and the second output signal output from the second comparing means and for outputting a third output signal;
• and
• switch means for controlling the output terminal to be on or off using the third output signal output from the output means.