(under subclass 9) Subject matter including a device which prevents generating a valid output upon an operational failure of the logic circuitry.
(1) Note. The fail-safe condition can be, for example, an automatic shut down of the logic circuitry or a predetermined, unchanging logic voltage output level.
(2) Note. The fail-safe condition may be actuated, for example, by invalid logic input signals or loss of such signals to the input as well as circuit breakdown or component malfunction which traverses the desired logic action.
