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An OR gate with a second curved line across its back.
Also known as: Exclusive OR gate, Difference gate
An exclusive-OR gate outputs a one when its inputs differ. The extra curved line drawn across its back is the only difference from an ordinary OR gate, and it is easily lost on a photocopied or scanned schematic.
Denotes a gate whose output is true when exactly one of two inputs is true.
Contexts: Technical drawing, Electrical equipment
Differs from the OR gate by a single additional curve across the input side, a mark easily lost in a poor reproduction of a drawing.
Contexts: Technical drawing, Electrical equipment
Is drawn in the IEC convention as a rectangle marked with an equals sign and a one.
Contexts: Technical drawing, Electrical equipment
A pointed gate shape with a second curved line drawn parallel to and clear of its curved back.