Patent ID: 7733137

Claim:
A design structure comprising a text file describing a system and/or a graphical representation of the system, wherein the text file and/or graphical representation is stored in a machine readable storage medium for use in a design process that designs a final design structure, wherein the system includes: (a) a phase-locked loop (PLL) including a PLL input and a PLL output; and (b) a multiplexer, wherein the multiplexer includes a multiplexer output electrically coupled to the PLL input, wherein the multiplexer further includes M multiplexer inputs, M being an integer greater than 1, wherein the multiplexer is configured to electrically couple one multiplexer input of the M multiplexer inputs to the multiplexer output, and wherein the multiplexer cannot simultaneously electrically couple more than one multiplexer input of the M multiplexer inputs to the multiplexer output, wherein the text file and/or said graphical representation of the system is for use along with a plurality of information elements as input in the design process, wherein each information element is selected from the group consisting of at least one library element, design specifications, characterization data, verification data, design rules, and test data, and wherein the at least one library element is selected from the group consisting of commonly used circuits, devices, models, layouts, symbolic representations for a given technology, and combinations thereof.