| http://www.w3.org/ns/prov#value | - The driver circuit of claim 11 wherein said output buffers are divided into N groups of more than one output buffer per group and said driver circuit comprises N first resistors, N common driver transistors, and N clamp means, where N is an integer greater than 1, with each first resistor, common driver transistor and clamp means associated with a respective one of said groups of output buffers.
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