Patent ID: 7383479

Claim:
A method of providing redundant logic paths on a device to mitigate radiation induced errors, the method comprising the steps of: providing a plurality of instances of a logic function, each instance having a logic output signal; and sending each logic output signal from each instance through a respectively associated one of a plurality of chip outputs, each chip output comprising a tri-state output buffer having a data input coupled to a respective instance of the logic function to receive the logic output signal and having an enable control input operable to enable and disable the associated chip output, the enable control of each tri-state output buffer being controlled by a respective one of a plurality of voting circuits each coupled to receive the logic output signals from all the instances of the logic function and each voting circuit associated with a respective one of the logic output signals from the instances of the logic function and each being operable to produce a control signal to the enable control input based upon the value of the associated logic output signal and the number of the logic output signals having the same value.