Internal Strobe Phase Matching for High-Speed Semiconductor I/O
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Solution Overview
Problem
High-speed semiconductor systems face challenges in maintaining phase synchronization between strobe signals and commands due to delay discrepancies in data transfer paths, leading to potential errors in data input/output operations.
Innovation Solution
A system utilizing a Delay-Locked Loop (DLL) clock to compensate for delay amounts in both the command and strobe signal paths, generating internal strobe signals to synchronize phases and ensure accurate data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If clock dividing technique is used to increase data transfer rate, then productivity is improved, but phase synchronization between strobe signal and command deteriorates due to path delay discrepancies
Solution Approach 1:
The patent applies preliminary action by compensating for path delays before the data transfer operation occurs. The system calculates the delay difference between the command path and strobe signal path in advance, then adjusts the strobe signal phase accordingly before deserialization begins, ensuring phase synchronization is established proactively rather than reactively
Solution Approach 2:
The patent implements feedback mechanisms to monitor and maintain phase synchronization between the strobe signal and command. The system continuously tracks the phase relationship and adjusts the strobe signal timing based on detected synchronization status, creating a closed-loop control system that maintains reliability during high-speed operations
2Productivity
If multi-phase clocks are generated for high-speed data input/output, then productivity is improved, but device complexity increases due to additional phase matching requirements
Solution Approach 1:
The patent extracts the delay compensation function from the main data transfer path and implements it as a separate preprocessing stage. By isolating the delay calculation and compensation mechanisms into dedicated circuits that operate independently from the core deserialization logic, the system manages complexity while maintaining high-speed performance
Solution Approach 2:
The patent segments the signal processing into distinct functional blocks: command path processing, strobe signal path processing, delay calculation unit, and phase adjustment unit. This segmentation allows each component to be optimized independently and simplifies the overall system architecture by clearly defining interfaces between modules
Data Source
AI summary
A system for performing a phase matching operation includes a controller configured to output a clock, a command, and a strobe signal, and to input/output data. The system also includes a semiconductor device configured to generate an internal strobe signal by matching the phases of the command and the strobe signal according to the clock, and to input/output the data in synchronization with the internal strobe signal, wherein the semiconductor device generates the internal strobe signal from the strobe signal by compensating for a delay amount of a first path to which the command is inputted and a delay amount of a second path to which the strobe signal is inputted.