Patent ID: 7312644

Claim:
A resetting device comprising: detection means for detecting a drop in a power supply voltage received by the said device; and means for generating a reset signal, activated after a drop in the said power supply voltage has been detected by the said detection means, wherein the said detection means comprise: a first control means itself comprising a first transistor forming a first switch and cooperating with energy storing means included within the said detection means, the said first transistor comprising a control element on which a first control voltage is applied, which is equal to the difference between the said power supply voltage and a first predetermined offset voltage, such that: if the said first control voltage is greater than a first threshold, the said first transistor is in a non-conducting state, in which the said first transistor authorizes storage of energy in the said storage means; and if the said first control voltage is less than or equal to the said first threshold, the said first transistor is in a conducting state in which the said first transistor authorizes the said energy storage means to release the said energy, so as to activate the said generation means; a second control means itself comprising a second transistor forming a second switch and cooperating with a first current source included within the said detection means, the said second transistor comprising a control element on which a second control voltage is applied, which is equal to the difference between the said power supply voltage and a second predetermined offset voltage, such that: if the said second control voltage is greater than a second threshold, the said second transistor is in a conducting state, in which the said second transistor prevents a current generated by the said first current source from reaching the said generation means; and if the said second control voltage is less than or equal to the said second threshold, the said second transistor is in a non-conducting state, in which the said second transistor directs the current generated by the said first current source to the said means for generating a reset signal, so as to activate the said generation means.