XOR gate, and whenever both signals are activated, it still turns on for a shorter time than if one was. Note that this short time can still activate machinery, and, though i am not sure, seems to be shorter than a redstone tick. If this is used on a sticky piston, it will push the block, but not retrieve it when the signal is over. Any help would be appreciated.
EDIT: I am using a button, if that helps, instead of levers. Also, the buttons have repeaters to extend them.