Adaptive Frequency Point Extraction and Calculation Method for VLSI Frequency Domain Simulation

Abstract

The application discloses a VLSI frequency domain simulation adaptive frequency point extraction and calculation method. The method includes calculating the electromagnetic response characteristics of the integrated circuit at the initial frequency points extracted in the frequency band according to the calculation requirements of the electromagnetic response characteristics of the integrated circuit frequency domain simulation and obtaining the electromagnetic response characteristic curve, and then inserting frequency points at the midpoints of each adjacent frequency point, Calculate and obtain the electromagnetic response characteristic curve, and judge whether the adaptive frequency point extraction is completed according to whether the difference between the two electromagnetic response characteristic curves before and after each frequency point inserted at the midpoint exceeds the range; the integration of the extracted frequency point The field-circuit coupling calculation of the electromagnetic response characteristics of the circuit is taken as a calculation task; multiple parallel coarse particles are used to independently perform multiple calculation tasks corresponding to multiple frequency points. This application can avoid the extraction of a large number of frequency points, and still cannot guarantee that the integrated circuit frequency domain simulation can meet the calculation accuracy requirements in the entire frequency band, and can also improve the calculation efficiency of the electromagnetic response characteristics of the integrated circuit at different frequency points.

Description

technical field [0001] The invention relates to the field of frequency domain simulation of integrated circuits, in particular to a method for extracting and calculating adaptive frequency points for VLSI frequency domain simulation. Background technique [0002] Integrated circuits have played a very important role in all walks of life and are the cornerstone of the modern information society. It is a miniature electronic device or component. It uses a certain process to interconnect the transistors, resistors, capacitors, inductors and other components and wiring required in a circuit, and makes them on a small or several small semiconductor chips or media. on the substrate, and then encapsulated in a package to become a microstructure with the required circuit functions. [0003] The calculation of the electromagnetic response characteristics of the integrated circuit at the intermediate frequency point in the frequency domain simulation of the integrated circuit needs t...

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Problems solved by technology

[0004] However, the inventor found in the process of implementing the present invention that the existing VLSI frequency domain simulation frequency point extraction is to extract some typical frequency points for processing according to the calculation requirements, but in this way, the number of frequency points that need to be extracted is very large. Moreover, the calculation accuracy requirements can only be achieved at the selected frequency point, but not in the entire frequency band. The simulated electromagnetic response characteristic curve has a large error. The calculation process of the electromagnetic response characteristics of integrated circuits involves a large number of large-scale numerical calculations of the same type, while conventional parallel computing is basically performed on a single computing instance. The parallel particles are usually very fine, and there are a large amount of data between different processes. Exchange, resulting in a reduction in the efficiency of parallel computing, it is difficult to meet the actual needs of high computational efficiency in the calculation of the electromagnetic response characteristics of integrated circuits at different frequency points in VLSI frequency domain simulation

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