Clock Path Delay Compensation Using Oscillating Path Feedback
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Solution Overview
Problem
Existing semiconductor systems face challenges in synchronizing multiple clock paths within semiconductor apparatuses, leading to variations in delay times and amounts, which can affect the accuracy and efficiency of clock signal generation and data transfer.
Innovation Solution
A semiconductor apparatus and system that includes multiple clock paths, an oscillating path generation circuit, and a delay information generation circuit, which form oscillating paths to measure and adjust delay times and amounts, ensuring synchronization by generating delay compensation signals to equalize the delay times across clock paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple clock paths are used to generate clock signals, then the functionality and performance of the semiconductor apparatus are improved, but variations in delay times and amounts occur across different clock paths
Solution Approach 1:
The patent implements a feedback mechanism where the delay detection circuit continuously monitors the delay times of multiple clock paths and feeds this information back to the delay adjustment circuit. This feedback loop enables real-time detection and correction of delay variations, ensuring that all clock paths maintain consistent delay times despite manufacturing variations or environmental changes.
Solution Approach 2:
The patent adjusts the delay parameters of individual clock paths dynamically based on detected variations. The delay adjustment circuit modifies delay elements in each clock path to compensate for timing differences, changing the delay parameters to achieve uniform delay times across all paths. This parameter adjustment resolves the contradiction by allowing each path to be tuned individually while maintaining overall system performance.
2Manufacturing precision
If delay adjustment circuits are added to equalize clock path delays, then delay time consistency is improved, but the device complexity increases
Solution Approach 1:
The patent merges the delay detection and delay adjustment functions into an integrated delay adjustment circuit that works cooperatively with the existing clock paths. Rather than adding completely separate systems, the detection and adjustment circuits are combined with the clock generation architecture, sharing resources and reducing overall complexity while achieving the goal of delay equalization.
Solution Approach 2:
The delay adjustment circuit operates autonomously by automatically detecting delay variations and adjusting its own parameters without requiring external intervention. The system self-regulates the clock path delays, eliminating the need for complex manual calibration circuits or additional control logic, thereby reducing device complexity while maintaining precision.
3Measurement precision
If oscillating paths are formed to detect delay times, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes oscillating signals to detect delay times by forming oscillating paths through the clock paths. The oscillation characteristics (frequency, phase) provide precise information about the delay times in each path. This vibration-based measurement method achieves high measurement precision by converting delay time into measurable oscillation parameters, allowing accurate detection without complex measurement equipment.
Data Source
AI summary
A semiconductor apparatus includes a first clock path which generates a first output clock signal by delaying a first phase clock signal, and a second clock path which generates a second output clock signal by delaying a second phase clock signal based on a delay compensation signal. The oscillating path generation circuit forms oscillating paths with the first clock path and the second clock path. The delay information generation circuit generates a delay compensation signal based on oscillating signals generated by forming the oscillating paths.