Patent ID: 7193379

Claim:
An electronic circuit arrangement for switching a state of an electrical load in a fail-safe manner, said electrical load being disposed in a path intermediate a power source and a first conductor, said electronic circuit arrangement coupled to at least one condition signal, said electronic circuit arrangement comprising: a) at least one logic manipulator means for receiving and processing said at least one condition signal and executing a predetermined truth table; b) a first enabling signal generated by said at least one logic manipulator means upon executing said truth table and validating said at least one condition signal; c) a switch biasing means coupled to said at least one logic manipulator means for generating a bias voltage upon receiving said first enabling signal; d) a first switch means disposed in a portion of said path intermediate said power source and said electrical load and coupled to said switch biasing means, said first switch means conducting upon generation of said bias voltage and passing a supply electrical current therethrough; e) whereby passage of said supply electrical current through said first switch means causes said electrical load directly coupled to said first conductor to switch from a first state to a second state; and f) whereby at least a discontinuation of said at least one condition signal causes said at least one logic manipulator means to discontinue said first enabling signal and discontinue passage of said supply electrical current to said electrical load switching thereof from said second state to said first state.