Patent ID: 6968157

Claim:
Interference protection system for a device having at least one interference signal entrance port, the interference protection system comprising: a sense unit, a protection unit coupled to said sense unit, said sense unit and protection unit being embedded into said device at said at least one interference signal entrance port, said sense unit including: a first and a second interference signal sensing element coupled by inputs thereof to said at least one interference signal entrance port, and said protection unit including: a first and a second MOSFET switch connected in series each to the other, and each operatively coupled to a respective one of said first and second sensing elements, said respective sensing element issuing an interference indicative output signal in response to detecting a receipt of an interference signal at said at least one interference signal entrance port, a respective one of said first and second MOSFET switches being switched off in response to said interference indicative output signal, thereby decoupling said device from the interference signal; and means for applying a threshold voltage to said at least one interference signal entrance port, said threshold voltage defining a level of an interference signal; wherein said protection unit further comprises a first and a second comparator, each of said comparators being operatively coupled by an input thereof to an output of a respective one of said first and second sensing elements, and each of said comparators being further coupled by an output thereof to a gate of a respective one of said first and second MOSFET switches.