{TAIL ~ The watch dog circuit} compares {HEAD ~ a second reference voltage} with a voltage exhibited by the first reset signal, and provides output of a second reset signal to the controller to reset the controller in dependence upon the comparison between the second reference voltage and the voltage exhibited by the first reset signal 
{ TAIL ~ The watch dog circuit } compares { HEAD ~ a second reference voltage } with a voltage exhibited by the first reset signal , and provides output of a second reset signal to the controller to reset the controller in dependence upon the comparison between the second reference voltage and the voltage exhibited by the first reset signal
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH