Abstract: A system for attaching an adhesive backed write-protect ring to an optical disk with the center of the ring aligned to the center of the central hole in the disk. A write-protect assembly is formed from a multilayer material having an adhesive backed label layer and a backing layer. The write-protect assembly includes a removable innermost area that, when removed, forms a hole having a diameter that is the same diameter as the central hole of an optical disk. The innermost area is at least partially surrounded by a ring shaped alignment area that is also removable. Finally, the alignment area is surrounded by the write-protect ring. The central area of the assembly is punched out to form a hole and the backing material is removed from at least part of the write protect area, exposing the adhesive coated surface. The assembly and an optical disk are placed onto an alignment cylinder.

Abstract: A method of formatting rewritable compact optical disks. In some example embodiments, a disk is initially partially formatted for immediate useability, and then additional incremental formatting is provided until the disk is completely formatted. The additional formatting may take place while a drive is off-line. In one embodiment, data is written to an unformatted disk with data writing and formatting taking place simultaneously. In various example embodiments, lead-in and lead-out areas may be written first with nothing in between or lead-in and lead-out areas may optionally written only if needed.

Abstract: A digital line driver circuit with active pull-down, high transient pull-up current, and limited steady-state pull-up current. Steady-state pull-up current is provided through a pull-up resistor. Transient pull-up current is provided by a capacitively coupled active pull-up circuit.