Clock Tree Fixing Device for Automatic Convergence Point Identification
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Solution Overview
Problem
In circuit design, performing a clock prefix operation on complex clock trees is time-consuming and inefficient, often requiring numerous multiplexers that increase circuit area and reduce design efficiency.
Innovation Solution
A fixing method and device for a clock tree that automatically identifies and sets candidate fix points based on clock signal path tracking and weighting values, allowing for quick and efficient execution of the prefix operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clock prefix operation is performed manually on a complex clock tree, then the clock signal can be properly transmitted, but the design time and effort are significantly increased
Solution Approach 1:
The system automatically performs clock prefix operations by identifying clock convergence points and selecting optimal fix points without requiring manual designer intervention. The automated algorithm analyzes the clock tree structure, calculates weighting values for candidate fix points, and generates the prefix operation configuration autonomously, thereby eliminating time-consuming manual work while ensuring reliable clock signal transmission.
Solution Approach 2:
The system changes the operational parameters of the clock tree by automatically adjusting clock signal transmission paths and selecting optimal fix points based on calculated weighting values. This parameter optimization enables the clock tree to function correctly without manual configuration, resolving the contradiction between reliable clock transmission and design time efficiency.
2Reliability
If multiple multiplexers are inserted into the circuit to transmit clock signals, then clock signal transmission is achieved, but the circuit area is considerably increased
Solution Approach 1:
The system extracts and eliminates the need for excessive multiplexers by automatically identifying optimal fix points in the clock tree. By selecting specific candidate fix points based on weighting values calculated from clock convergence points, the system removes unnecessary clock buffering elements while maintaining reliable clock signal transmission, thereby reducing circuit area.
Solution Approach 2:
The system optimizes the clock tree configuration by changing parameters such as clock signal transmission paths and fix point selections. This optimization reduces the number of multiplexers required compared to conventional approaches, achieving reliable clock transmission with minimized circuit area occupation.
3Ease of operation
If conventional EDA software performs clock tree synthesis with multiple multiplexers, then clock signals can be transmitted through the circuit, but the design complexity and area increase
Solution Approach 1:
The system performs clock tree synthesis automatically by identifying clock convergence points and selecting optimal fix points without requiring complex manual configuration. The automated algorithm handles the entire clock tree synthesis process, including fix point identification and weighting value calculation, thereby simplifying the design process while reducing circuit complexity compared to conventional multiplexer-based approaches.
Solution Approach 2:
The system changes the synthesis approach by optimizing clock tree parameters through automated fix point selection based on weighting values. This parameter optimization simplifies the overall circuit structure by eliminating the need for numerous multiplexers, making the design easier to operate while reducing device complexity.
Data Source
AI summary
A fixing device and a fixing method for a clock tree are provided. The fixing method for the clock tree includes: performing a clock signal path tracking operation on a netlist of a circuit according to timing constraint information to obtain a clock tree circuitry structure; identifying a convergency status of the clock tree circuitry structure to find out at least one clock convergence point, and setting one of a plurality of clock signals on the clock convergence point as a selected clock signal; performing a fix point identification operation on the clock tree circuitry structure based on the selected clock signal to obtain a plurality of candidate fix points; and calculating a plurality weighting values of the candidate fix points, obtaining a plurality of selected fixed points according to the weighting values.