Patent ID: 7668682

Claim:
A design structure comprising design data embodied in the format of a text file or a graphical representation of a circuit, said design structure stored on a computer readable storage medium, said design structure being usable as an input to a design process for designing, manufacturing, and/or testing an integrated circuit, said design structure describing a semiconductor device in the form of a hardware descriptive language, said hardware descriptive language comprising instructions that when executed by a processor translates said design structure into a final design structure, said design structure describing that said semiconductor device comprises: a process sensitive circuit; a measurement circuit, wherein said semiconductor device is subjected to a first operating condition, wherein said measurement circuit is for measuring a first value for a parameter of said process sensitive circuit at a first time, wherein said semiconductor device is operated such that said semiconductor device performs at least one intended function, wherein said measurement circuit is for measuring a second value for said parameter of said process sensitive circuit at a second time, and wherein said second time differs from said first time; a calculation circuit for determining a first differential value between said first value and said second value; and a control circuit for receiving an enable signal and enabling said measurement circuit.