Clock Generator Warm-Up Control for Signal Integrity
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Solution Overview
Problem
Current storage devices face signal integrity issues during high-speed data transmission due to channel effects, particularly at the initial stages of clock toggling, where conventional warm-up cycle operations fail to effectively manage pause periods, leading to potential signal integrity problems.
Innovation Solution
A memory device with a clock generator that recognizes a portion of the external clock signal as a dummy signal during initial toggling, generates a warm-up enable signal, and resets it when a pause period is detected, enabling a delayed internal clock signal to prevent signal integrity issues by controlling the warm-up cycle operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a warm-up cycle operation is implemented to recognize initial clock toggles as dummy signals, then signal integrity is improved, but device complexity increases due to additional control logic
Solution Approach 1:
The patent implements preliminary action by introducing a warm-up cycle operation that performs preliminary dummy clock toggles before actual data transmission begins. The warm-up enable signal is generated to recognize initial clock toggles as dummy signals and delay the internal clock signal accordingly, preparing the channel for reliable high-speed data transmission without signal integrity issues
Solution Approach 2:
The patent uses an intermediary approach by introducing a warm-up enable signal as a mediator between the external clock signal and the internal clock signal. This intermediary signal controls the timing relationship during the warm-up period, allowing the system to manage the transition from initial dummy toggles to actual data transmission without direct complex control logic
2Reliability
If the warm-up enable signal is not reset when a pause period is detected, then the dummy signal recognition continues, but data transmission reliability deteriorates due to potential signal integrity problems
Solution Approach 1:
The patent implements feedback by monitoring the external clock signal for pause periods and using this feedback to control the warm-up enable signal. When a pause period is detected (where the external clock signal stops toggling for a predetermined time), the warm-up enable signal is reset, allowing the system to adapt to changing transmission conditions and maintain reliability
Solution Approach 2:
The patent applies dynamics by making the warm-up cycle operation adjustable and responsive to real-time conditions. The warm-up enable signal is dynamically controlled based on whether pause periods are detected in the external clock signal, allowing the system to extend or terminate the warm-up period as needed to maintain optimal signal integrity
Data Source
AI summary
A memory device including a clock generator generating a data processing clock signal based on an external clock signal, and an input/output circuit performing a data transmission/reception operation of transmitting/receiving data to/from an external device based on the data processing clock signal, wherein the clock generator comprises a warm-up operation controller generating a warm-up enable signal for recognizing a portion of a period of the external clock signal as a dummy signal, and resetting the warm-up enable signal when a pause period where a toggle of the external clock signal is temporarily stopped is detected.