Patent ID: 7793235

Claim:
A design structure embodied in a machine readable medium used in a design process, the design structure comprising: a logic circuit adapted to receive a control signal for enabling said design structure; an array of sub-circuits comprising a first group of sub-circuits and a second group of sub-circuits, wherein an output of said logic circuit is electrically connected to an input of each sub-circuit of said first group of sub-circuits; a first switching circuit, wherein an output of each said sub-circuit of said first group is electrically connected to an input of said first switching circuit, wherein an output of said first switching circuit is electrically connected to an input of each sub-circuit of said second group of sub-circuits, and wherein said first switching circuit is adapted to select a first sub-circuit from said first group in response to a first select signal applied to said first switching circuit; a second switching circuit, wherein an output of each said sub-circuit of said second group is electrically connected to an input of said second switching circuit, wherein an output of said second switching circuit is electrically connected to an input of said logic circuit, wherein said second switching circuit is adapted to select a second sub-circuit from said second group in response to a second select signal applied to said second switching circuit, wherein said design structure is adapted to be subjected to a first operating condition and generate a first frequency, wherein said design structure is adapted to be subjected to a second operating condition and generate a second frequency, and wherein a first frequency differential between said first frequency and said second frequency is adapted to be compared to a predetermined frequency differential to determine if said first frequency differential is about equal to said predetermined frequency differential; and a control unit electrically connected to said first switching circuit and said second switching circuit, wherein said control unit is configured to provide said first select signal and said second select signal.