Memory Module Clock Driver With Phase-Adjusted Delay Control
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Solution Overview
Problem
As memory module speeds increase, ensuring signal integrity of high-frequency clocks becomes crucial, but existing technologies struggle to effectively manage clock delays and phase adjustments to maintain signal quality.
Innovation Solution
A memory module with a clock driver that adjusts clock delay intervals by comparing the phases of division and feedback clocks, utilizing phase detection circuits and clock delay circuits to generate internal clocks with controlled delay intervals, thereby stabilizing signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operating speed of the memory module is increased, then the productivity is improved, but the signal integrity of the clock deteriorates
Solution Approach 1:
The patent applies preliminary action by adjusting the clock delay interval in advance based on detected phase differences between division clocks. The clock driver proactively compensates for phase misalignment before it causes signal integrity issues, rather than reacting after the problem occurs. This is achieved through the phase detection circuit that continuously monitors and adjusts delay intervals to maintain proper clock synchronization across memory chips operating at high speeds.
2Device complexity
If a single clock delay interval is used for all memory chips, then the device complexity is reduced, but the adaptability to different chip positions deteriorates
Solution Approach 1:
The patent applies dynamics by making the clock delay interval adjustable and variable rather than fixed. The system dynamically adapts the delay interval based on the detected phase differences between division clocks from different memory chips. This allows the clock driver to optimize timing for each chip's specific position and characteristics while using a unified control mechanism, balancing complexity and adaptability.
3Reliability
If the clock delay interval is adjusted to compensate for phase differences, then the signal integrity is improved, but the device complexity increases
Solution Approach 1:
The patent applies merging by integrating the phase detection circuit and clock delay adjustment functionality directly into the clock driver, rather than using separate external components. This consolidation achieves the necessary phase compensation and signal integrity improvement while minimizing the increase in device complexity by combining multiple functions into a single integrated unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances signal integrity by reducing jitter and maintaining clock signal quality across memory chips, ensuring reliable operation even with variations in voltage and temperature.
Implementation Method 1
the clock driver may adjust the clock delay interval by comparing the phase of the division clock and the phase of a feedback division clock that is generated from the internal clock
Implementation Method 2
configured to generate an internal clock that is transmitted to memory chips by delaying a division clock that is generated from the external clock by a clock delay interval
Implementation Method 3
The solution enhances signal integrity by reducing jitter and maintaining clock signal quality across memory chips
Data Source
AI summary
A memory module includes a clock driver configured to receive an external clock through a module pin and configured to generate an internal clock that is transmitted to memory chips by delaying a division clock that is generated from the external clock by a clock delay interval. The clock driver adjusts the clock delay interval by comparing the phase of the division clock and the phase of a feedback division clock that is generated from the internal clock.