Correction Method for Power Analysis of Digital Integrated Circuits Based on Standard Cells.

With the rise of digital integrated circuit technology and the prevalence of mobile smart devices, chip power consumption and heat generation have become critical concerns. Accurate and swift power analysis is vital in integrated circuit design to prevent redesign setbacks. PrimeTime PX (PTPX), a robust circuit simulation tool from Synopsys, offers power analysis capabilities, boasting speed advantages over the industry gold standard HSPICE but faces a certain level of accuracy loss. This work investigates the disparities between PTPX and HSPICE tools in digital circuit power analysis and proposes a correction algorithm based on standard cells. The algorithm conducts power simulations on the most commonly used standard cell circuits, analyzes the error correlation between PTPX and HSPICE via numerical regression, and derives correction factors that quantify these discrepancies. For a given circuit, once the PTPX power result is obtained, the error is promptly estimated using these correction factors. The summation of the PTPX result and the estimated error yields the corrected result. Experimental results show an average error between PTPX and HSPICE power results is 18.51%, reduced to 9.01% after correction. The proposed algorithm implementation scarcely incurs extra time, enhancing accuracy by an average of 9.50 percentage points. [ABSTRACT FROM AUTHOR]