Clock Alignment Training Circuit for Multi-Phase Memory Clocks
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Solution Overview
Problem
Conventional semiconductor devices operating at high speeds face challenges in clock alignment during initial operation, requiring phase synchronization between system and data clocks to ensure proper data transmission, which can be time-consuming and inefficient due to unpredictable generation of multi-phase data frequency division clocks.
Innovation Solution
A circuit that includes a clock input block, a clock frequency dividing block to generate multi-phase data frequency division clocks with predetermined phase differences, and phase detecting blocks to determine and adjust the phase alignment, allowing for controlled phase reversal and synchronization of system and data clocks, thereby optimizing the clock alignment training process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional clock alignment training is performed with unpredictable multi-phase data frequency division clocks, then the circuit structure is simpler, but the training time is extended and efficiency is reduced
Solution Approach 1:
The patent applies preliminary action by pre-generating multiple data frequency division clocks with predetermined phase differences before the clock alignment training process begins. The clock frequency dividing block creates these divided clocks in advance with known phase relationships, allowing the training process to start immediately without unpredictable clock generation delays.
Solution Approach 2:
The patent implements dynamics by making the clock phase alignment adaptive and controllable. The phase detecting block dynamically monitors the phase difference between system clock and data clock, and the circuit can adjust the clock phase through controlled reversal based on detection results, enabling flexible optimization of alignment timing.
2Productivity
If multi-phase data frequency division clocks are generated with predetermined phase order, then the clock alignment efficiency is improved, but the circuit complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the clock frequency into multiple phase-separated data frequency division clocks. The clock frequency dividing block segments the original data clock into several divided clocks, each with a predetermined phase difference, allowing parallel phase detection and faster alignment training.
Solution Approach 2:
The patent uses an intermediary approach by introducing a dedicated clock frequency dividing block and phase detecting block as intermediary components between the data clock input and the training process. These intermediary blocks prepare and monitor clock phases, facilitating efficient alignment without requiring complex direct control mechanisms.
3Measurement precision
If phase detection and control is implemented for clock alignment, then the synchronization accuracy is improved, but the operation complexity increases
Solution Approach 1:
The patent implements feedback by using the phase detecting block to continuously monitor the phase difference between the system clock and data clock. The detection results are fed back to control the clock phase adjustment, creating a closed-loop system that automatically achieves and maintains accurate synchronization.
Solution Approach 2:
The patent applies self-service by enabling the clock alignment training circuit to automatically detect phase differences and adjust clock phases without external intervention. The phase detecting block and frequency dividing block work autonomously to achieve synchronization, reducing operational complexity.
Data Source
AI summary
A semiconductor device includes a clock input block to receive a system clock and a data clock, a clock frequency dividing block to generate a plurality of multi-phase data frequency division clocks each of which has the phase difference of a predetermined size by dividing a frequency of the data clock and to determine whether or not phases of the plurality of multi-phase data frequency division clocks are reversed in response to a frequency division control signal, and a first phase detecting block to detect a phase of the system clock based on a phase of a first selected clock that is predetermined among the plurality of multi-phase data frequency division clocks and to determine a logic level of the frequency division control signal in response to the detected result.