Internal Clock Phase Alignment for Duty Ratio Adjustment
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Solution Overview
Problem
High-speed semiconductor systems face challenges in efficiently adjusting duty ratios and synchronizing data transmission due to the complexity of clock signal phases, leading to inefficiencies in data processing and transmission.
Innovation Solution
A semiconductor device with an internal clock generation circuit that adjusts division clock signals based on code signals to generate synchronized internal clock signals, allowing for precise alignment of internal data and interrupting output data generation based on command blocking signals, thereby optimizing duty ratio adjustment operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If clock signal frequency is divided to generate multi-phase clock signals for high-speed data transmission, then data transmission rate is improved, but clock signal phase complexity increases
Solution Approach 1:
The clock signal is divided into multiple phase components (first through fourth division clock signals) that are processed separately through individual delay circuits. Each phase is adjusted independently using code signals, allowing complex multi-phase clock generation to be broken down into manageable segmented operations that maintain high transmission rates while reducing overall system complexity
Solution Approach 2:
The delay times of the division clock signals are made dynamically adjustable through code signals (first code signal and second code signal) that control the delay circuits. This dynamic adjustment capability allows the system to optimize phase alignment in real-time, managing clock phase complexity adaptively while maintaining high-speed data transmission performance
2Productivity
If internal data is aligned in synchronization with adjusted internal clock signals, then data processing efficiency is improved, but duty ratio adjustment complexity increases
Solution Approach 1:
The system uses feedback mechanisms where the aligned internal data is compared against timing references, and code signals are adjusted based on detected timing relationships. This feedback loop enables automatic duty ratio optimization, improving data processing efficiency while the control system manages the complexity of duty ratio adjustments through automated rather than manual processes
Solution Approach 2:
The delay circuits are configured to pre-adjust the phase of division clock signals before data alignment operations. By performing preliminary phase adjustment through controlled delay elements, the system prepares the clock signals in advance, simplifying the subsequent data alignment process and improving overall data processing efficiency without requiring complex real-time adjustments
3Reliability
If output data generation is interrupted based on command blocking signals, then data transmission reliability is improved, but processing time increases
Solution Approach 1:
Command blocking signals are generated in advance based on predicted timing conditions, preventing potential data transmission errors before they occur. By proactively interrupting output data generation when timing misalignment is anticipated, the system maintains high reliability while minimizing unnecessary interruptions through predictive rather than reactive control
Solution Approach 2:
The system applies command blocking signals selectively to specific data output operations rather than continuously interrupting all processing. By applying partial blocking only where and when needed based on timing conditions, the system achieves reliable data transmission without excessive processing time loss from unnecessary interruptions
Data Source
AI summary
A semiconductor device includes an internal clock generation circuit and a data processing circuit. The internal clock generation circuit delays first to fourth division clock signals, which are generated by dividing a frequency of a clock signal, by a delay time adjusted based on a first code signal and a second code signal to generate first to fourth internal clock signals. The data processing circuit aligns internal data in synchronization with the first to fourth internal clock signals to generate output data. The data processing circuit also interrupts generation of the output data based on first and second command blocking signals according to a point in time when a read command is inputted.